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1 How to Re-Cap Vintage National HRO-5TA1 Tube Ham Radio ...
https://www.youtube.com/watch?v=yp9rFtp1_78
D-lab Electronics
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2 National HRO Part 4 - Western Historic Radio Museum
https://www.radioblvd.com/National_HRO_Part4.htm
Modifications - Unfortunately, the HRO and HRO Senior receivers were built during the Depression. This means that many hams - out of economic necessity - had to ...
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3 S -METER MODIFICATION FOR THE HRO RECEIVER
https://worldradiohistory.com/hd2/IDX-UK/Amateur-SW/Archive-Short-Wave-Magazine-UK-IDX/IDX/60s/SWM-1965-09-OCR-Page-0026.pdf
S -METER MODIFICATION FOR. THE HRO RECEIVER. DESCRIBED IN DETAIL. F. W. T. ATKIN, A,M.I.E.R.E., M.T.S.. The writer's advice to any ambitious and.
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4 Improving the HRO Receiver, RSGB, March 1957 - G4KFK
http://www.g4kfk.co.uk/5703_RSGB_Improving_the_HRO_Receiver.pdf
COMPARING the writer's HRO (an old "glass valve " model) with a modern receiver indicated that all was not well with the r.f. gain and signal-to-noise ratio.
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5 Emmitt's Fix It Shop
http://emmittsfixitshop.com/Projects_HRO.html
The HRO receivers were so well regarded during WWII that they were copied by the ... stages of restoration and the modifications we did to this receiver.
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6 hro-5.pdf - Crypto Museum
https://www.cryptomuseum.com/df/hro/files/hro-5.pdf
The HRO-5 Radio Receiver is a high-frequency superheterodyne suitable for ... the crystal is modified by damping, or loading the crystal by means of the ...
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7 HRO - Barry Williams - PrismNet
https://www.prismnet.com/~nielw/HRO_BarryWilliams/HROArticle.htm
Operating one of these receivers next to an HRO shows that the AGS has several shortcomings that were corrected in the HRO. The first of these was the coil plug ...
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8 National HRO - QSL.net
https://www.qsl.net/ea4bb/EA4BB/National_HRO.html
The National HRO is a classic receiver if there is any. ... upgrades and modifications until the 1960s, when the last version (HRO 60) was produced.
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9 National HRO Renovation Project - G4AQB - Analogue Native
https://g4aqb.wordpress.com/2018/12/03/national-hro-renovation-project/
The layout and wiring of the HRO receiver is easy to follow and ... an old article in Short Wave Magazine which suggested a modification.
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10 National's legendary 'HRO' - WordPress.com
https://nzvrshome.files.wordpress.com/2018/10/nationals-legendary-hro.pdf
excellence and remained in production with minimal changes for 30 years. ... communication receiver design right to the end of the valve era. ********.
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11 National HRO Communications Radio - Electronics Notes
https://www.electronics-notes.com/articles/history/radio-receivers/national-hro-vintage-communications-radio.php
The National HRO is a vintage radio communications receiver that was introduced in ... Coil sets: One of the first features is that the band changes are ...
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12 National HRO Receiver - YouTube
https://www.youtube.com/watch?v=l0yYBoiaLa0
AllTheGearNoIdea
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13 Amateur Radio Station G4GKA - My HRO Receiver 1
http://www.gka-radio.co.uk/hro/hro_p1.htm
This particular National HRO 5T was very shabby and had been extensively butchered. There were unnecessary modifications and extra holes drilled in the ...
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14 HRO 60 RF Alignment - Antique Radio Forums • View topic
https://antiqueradios.com/forums/viewtopic.php?f=5&t=369647
There were both an FM discriminator and a 100Kc/1Mc calibrator module that plugged into the two octal sockets behind the fire wall. On some receivers there was ...
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15 HRO Junior (much modified) - Radio Museum
https://www.radiomuseum.co.uk/Junior.html
I rediscovered this amateur-modified HRO the other day after confusing ... position for using the receiver with a transmitter but never implemented and ...
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16 National HRO 5T Renovation
https://www.vintage-radio.net/forum/showthread.php?t=144131
The receiver part shown in the background is an HRO Senior, rack mount. Good luck with it all and enjoy. Lawrence. EDIT: For easy SSB you will ...
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17 Tech: General: Couplate Info - The AM Window
https://amwindow.org/tech/htm/jnreceiverguide.htm
Based on my experiences with almost every US-made receiver, I'll try to help ... modifications and feed the detector audio to an external hi-fi amplifier.
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18 National HRO.M high-frequency communications receiver, 1944
https://collection.sciencemuseumgroup.org.uk/objects/co35262/national-hro-m-high-frequency-communications-receiver-1944-receiver
There are many versions of the HRO receiver and each new production run saw a number of smaller or larger modifications being made to the design.
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19 SDRplay SDRplay RSP1A Receivers Communications ...
https://www.hamradio.com/detail.cfm?pid=H0-015965
Additional Savings. -$25.00 2022 Holiday Sales Event (Exp:11/28/22). HRO Discount Price: $99.95*.
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20 Model AQST East German 'HRO' Receiver
https://armyradio.com/Model_AQST_East_German_HRO_Receiver.html
As many readers will know, the National HRO receiver - or at least, its design concept of an all-band receiver with plugin coil packs and a large indirectly ...
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21 Reviews For: National HRO500 Receiver - eHam.net
https://www.eham.net/reviews/view-product?id=3183
National Radio's all-transistor HRO receiver from the early/mid 1960's ... BCB stations showed up here and there due to the X-mod plus minimal front end ...
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22 manual - -> RadioManual.eu <-
http://www.radiomanual.info/schemi/Surplus_NATO/FSM-1_R-140_HRO_series_serv_user_TM11-885_1946.pdf
Differences in models, National HRO series of receivers. II. Installation. ... models of HRO receivers, and the modifications in Radio Receiver R-140/FSM-1, ...
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23 EB5AGV's National HRO-500 pages
https://www.jvgavila.com/hro500.htm
One of the recommended mods is to use a larger emitter bypass cap in the oscillator in order to raise the gain. The capacitor is C127, and the original 0.1uF ...
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24 The National HRO-5TA1: Parting is such sweet sorrow…
https://swling.com/blog/2018/01/the-national-hro-5ta1-parting-is-such-sweet-sorrow/
The only receiver I kept for myself was a National HRO-5TA1. ... necessary upgrades to make her airworthy again (needs at least recapping).
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25 The AA8V Twinplex Regenerative Receiver
https://www.frostburg.edu/personal/latta/ee/twinplex/others/twinplexothers.html
Twinplex Receivers Built By Others, Modifications ... Mark was lucky enough to have a National HRO-50 PW vernier dial and capacitor assembly that he could ...
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26 Modifying the AR7 Receiver - Tube Radio Australia
http://www.tuberadio.com/robinson/Manuals/AR7_AR_mods.pdf
make all the modifications to be described! ... the H.R.O. design, this receiver covers ... stages) the sensitivity of the receiver.
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27 National HRO-50 receiver
https://pestingers.net/pdfs/other-radios/misc-radios/national-hro50-man.PDF
The HRO-50 is compensated for frequency drift due to temperature changes which may detune the Receiver from the desired signal over long or short periods of ...
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28 HRO50manuaali.pdf
https://oh3abn.net/sivut/wp-content/uploads/2016/11/HRO50manuaali.pdf
The HRO-50-1 is compensated for frequency drift due to temperature changes which may detune the receiver from the desired signal over long or short periods ...
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29 HROReceiver@groups.io | HRO miniature tube article?
https://groups.io/g/HROReceiver/topic/hro_miniature_tube_article/73233606?p=
a somewhat hacked HRO jr followed me home but three of the tube sockets ... receivers around which were actually modified professionally.
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30 Kingsley Radio Archives • AmateurRadio.com
https://www.amateurradio.com/tag/kingsley-radio/
For the longest time I was thinking what you are probably thinking now, I had been using a National HRO receiver right? Well, you'd be wrong … just as I had ...
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31 ...
https://secure.toolkitfiles.co.uk/clients/22828/sitedata/files/VMARS-SIGNAL-Index-modified-March-2022-4-.pdf
Letters: HRO 15m bandspread coil pack ... The Royal Air Force R1155 Radio Receiver ... Modifications to the Plessey PVS38XX Receivers.
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32 National HRO-5 receiver : Other - Armedconflicts.com
https://www.armedconflicts.com/National-HRO-5-receiver-t81823
No1 had a range of 138 to 25 MHz, of course without amateur bands. This was the electrical and mechanical concept of the HRO, but modified in some details. No8 ...
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33 Ship's Radio Equipment 1943 - Jerry Proc
http://jproc.ca/rrp/sradequ.html
He explains the modifications made to the B28 receiver that he used while in the RNR. ... The list price of the HRO receiver was $US 350 in 1939.
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34 US Navy HF & MF Receivers - 1950's & 1960's
https://www.navy-radio.com/rcvrs.htm
Schematic from a Navy training course showing "Typical SSB Receiver" which ... Collins 51J-3 with MFP and modified antenna input ckt ? ... National HRO-50-1
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35 HRO-7 Operation & Service manual.pdf
https://www.manuals.cornpone.net/National/HRO-7%20%20%20%20Operation%20%26%20Service%20manual.pdf
HRO-7. RADIO RECEIVING. EQUIPMENT. An Outstanding Communications Receiver ... The HRO-7 is compensated for fre- quency drift due to temperature changes oc-.
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36 AMR100 - vk2rh
http://vk2rh.com/amr101/
Also occupying a position on the equipment rack was a very shiny Kingsley AR7, the famously unauthorised copy of the National HRO receiver ...
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37 CclMM U I\I I CATI cl NS FIEG EIVEFI
http://www.brera.mi.astro.it/~carpino/ricognizione/documenti/National_HRO500.pdf
HRO-500 Receiver Chassis, With Synthesizer and Covers Removed, Top View ... against changes in primary line voltage. Total drift of the HRO-500 from turn-on ...
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38 National HRO Receivers - Ozaukee Radio Club
https://www.ozaukeeradioclub.org/index.php/component/easyfolderlistingpro/?view=download&format=raw&data=eNpFT0EOwiAQ_Mt-QNDY2u0LNPHssUHZtiS0EKC2xvh3Qdp4WmaY2ZkVyDm-PRYIrdGSHNQeKwRp5lEbIX3CUQKTXCeXFZlCYNtXN5EPf3eJ0DQ_LqFTto5ioAQZQhpFZpWEWiHLJkfaitCvBXbWmc6Jwa9LWqVpW8KPCHvGS3ZsruLV3KrLOdEHBFrC-rKyXcvQYpUjvyXxWEGEIB79QGNU35HnROvoqWjOR8SCnTGdjnmfL1ZCW0E,
In the 1930's a superhetrodyne receiver was ... Ad featuring James Millen's personal HRO receiver ... Superhetrodyne design changes.
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39 RME
http://www.k1nv.com/Nat.html
The "HRO" model first produced in 1934-35, was a marvelous receiver which underwent some electronic changes over the years, but maintained the same rugged ...
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40 Ham Radio Receivers Radio Transceivers for sale - eBay
https://www.ebay.com/b/Ham-Radio-Receivers-Radio-Transceivers/40065/bn_7116531992
VINTAGE HEATHKIT HR1680 RECEIVER HR 1680 Heath Company ... Kenwood TK-981 HAM Radio 902MHz Front End Receiver Filter Mod SERVICE. $89.00. Free shipping.
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41 the awa - review - Antique Wireless Association
https://www.antiquewireless.org/wp-content/uploads/Vol.-17.pdf
Communications receiver collectors have long been fond of the. National HRO. ... A number of obvious, sequential modifications to the TR-1 allow.
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42 Homebrew Ham Bands Receiver
https://people.ohio.edu/postr/bapix/HB_hroDl.htm
I did not check, but given the set's peformance, I believe the IF cans may have been modified to limit bandwidth. HomeBrew w/HRO dial bottom (60k). Trouble- ...
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43 Radio Prepares for War, Part 1
https://www.wshu.org/vintage-radio/2014-09-08/radio-prepares-for-war-part-1
The National Company's high-tech ham receiver would meet the requirements with some modifications. None the less, completing a prototype based ...
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44 The Y Service 1939-1945 - Gold Beach Museum
http://www.goldbeach.org.uk/yservice/Equipment.htm
The HRO radio Receiver is a High -Frequency super heterodyne suitable for C.W., M.C.W and phone reception throughout the frequency range of frequencies is ...
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45 Wireless Set No19 Group UK and Commonwealth Receivers ...
https://www.royalsignals.org.uk/uk-commonwealth-rx-tx.html
› uk-commonwealth-rx...
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46 national radio company, inc.
http://www.ontheshortwaves.com/Ads/National_50th_Anniv_Album-1964.pdf
These were the grand old receivers that introduced today's old-timers to amateur radio-names like the FB-7 and FBX-A, the AGS, the mighty HRO series, ...
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47 BC-348 - Wikipedia
https://en.wikipedia.org/wiki/BC-348
The BC-348 is a compact American-made communications receiver, which was mass-produced during World War II for the U.S. Army Air Force.
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48 National HRO Sixty at Dayton | The original HRO receiver. Th…
https://www.flickr.com/photos/exposite/4925794318
The original HRO receiver. This one is in very good condition for a 60+ year old radio. The Kingsley Radio Co made a receiver for the Australian Army, ...
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49 KN4R - Callsign Lookup by QRZ Ham Radio
https://www.qrz.com/db/kn4r
"National HROs and HRO Clones". "National Moving Coil Communication Receivers 1936-1949". "Hugo Leuteritz and the Early Radios of Pan Am ...
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50 Signal, Direct-Conversion Receiver with DSP Filtering - ARRL
https://www.arrl.org/files/file/Technology/tis/info/pdf/9804x040.pdf
ugly modifications—it's so easy! ... Figure 1—A block diagram of the receiver showing how the DSP56002EVM fits into the R2 ... wwc.edu/~frohro/R2-DSP.html.
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51 75A1_mods_qst_9_51.pdf
http://jptronics.org/Collins/75A1/75A1_mods_qst_9_51.pdf
These differences Modifications to the Collins 75A-1 Receiver to variations in the input ... The HRO, the PR-10, the SX-28 and a very few.
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52 Articles : Vintage & Military Amateur Radio Society - VMARS
https://www.vmars.org.uk/Articles
Modification of Crew Box 2-set and Design of an interface unit for ... on certain questions about the development and construction of the HRO receiver.
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53 Hro mars mod
https://myviadellerose.fr/hro-mars-mod.html
Apr 19, 2021 · Kenwood TH-D74A D-Star Tri Band Radio with Mars MOD. ... HRO-7 - For 1947, the HRO-7 was introduced and this receiver totally changed the ...
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54 Antique Army Surplus Receiver Restored - Hackaday
https://hackaday.com/2020/06/13/antique-army-surplus-receiver-restored/
› 2020/06/13 › antique-army-sur...
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55 Pin on Amateur radio - Pinterest
https://www.pinterest.com/pin/577305245962316059/
Jan 24, 2019 - Collins KWS-1 transmitter and 75A-4 receiver. ... Guest Post: National HRO-500 Unboxing and Initial Tests. More information ...
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56 RME 6900 Receiver | Amateur Radio Station W5HRO / 6
https://w5hro.com/threads/rme-6900-receiver.3/
Another one of this receiver's really strong points is it's great front-end selectivity at the antenna input to the RF amplifier. Basically, ...
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57 ARRLs Vintage Radio.pdf - Index of
https://nvhrbiblio.nl/biblio/boek/ARRL%20-%20Vintage%20radio.pdf
Armstrong's modification to the basic Audion receiver adds an additional tuned circuit to ... HRO tuning knob (these are really cool), frequencies.
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58 National HRO-60 Receiver - W1VD
http://www.w1vd.com/NationalHRO-60.html
Note that there is a second set of audio distortion numbers for 'modified agc'. As a quick test a .1 uF was bridged across the existing .01 uF main AGC ...
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59 SB-400
https://img1.wsimg.com/blobby/go/b3015c3a-9910-4820-ada1-dfba5053149d/downloads/ham%20radio%20sample%20pages.pdf?ver=1629932703416
Getting these signals out of the SB or. HW transceivers and receivers requires a modification to the units which includes the drilling of up to ...
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60 File:Vintage National HRO Sixty Shortwave Receiver With ...
https://commons.wikimedia.org/wiki/File:Vintage_National_HRO_Sixty_Shortwave_Receiver_With_Plug-In_Coils_(Inside_View),_Metal_Cabinet,_Made_In_USA,_Produced_1952_-_1964_(33803659565).jpg
File:Vintage National HRO Sixty Shortwave Receiver With Plug-In Coils ... provide a link to the license, and indicate if changes were made.
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61 Instruction, users and service manuals for National - mods.dk
https://www.mods.dk/manual.php?brand=national
ZIP file. HRO-1935 Manual.zip, 2.257 Kbytes. ZIP file. HRO-5-series Manual.zip, 5.535 Kbytes ... ZIP file. RHP HF Receiver Manual.zip, 1.619 Kbytes.
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62 N9OO Electric Radio Magazine Index
https://index.ermag.com/index.cfm?action=browse
351, August/2018, Receivers, The National HRO-500 Frequency Synthesizer ... 234, November/2008, Modifications, Heathkit HR-10 Receiver Update, Stock ...
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63 HRO Receiver Restoration Project
http://www.macnaughtonart.com/hro_restoration.htm
Circuitry wise, the HRO 50T1 is quite curious. It is a very standard circuit for a 15 valve, single conversion receiver, but the front end consists of two ...
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64 HRO.pdf - jdunman.com
http://www.jdunman.com/ww/AmateurRadio/VendorCatalogs/HRO.pdf
&DOO ² HRO Discount Price ... a general coverage receiver for 300 kHz to 60 MHz, transmits on amateur HF ... HRo will provide 10 meter modification.
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65 Ham Radio Information - One Electron
https://www.one-electron.com/Archives/Techs_FC/FC_Ham.html
Central Electronics - mods to BC-457, BC-458, BC-459 as VFO Central Electronics MM-2 multiphase RF ... Drake 2-B Communications receiver manual w/schematic
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66 Restoration
http://www.g4aym.org.uk/library/national/introduction/restoration/index.htm
My HRO-500 is, as far as I can tell, in original condition except that its ... So, I decided for the sake of both the receiver's health and my own to run ...
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67 WW2 & Pre-war US Navy Receivers (R series) - VIR History
http://virhistory.com/navy/rcvr-ww2.htm
D series - Direction Finders - Click Here · RAE - Triple diversity system using three RAB receivers --- need photos · HRO - USN "TYPE HRO" - LL- number indicates ...
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68 T-368 Transmitter - KG2IC Mods
https://w1ujr.com/t-368-transmitter-kg2ic-mods/
Power down the T-368, remove the line cord from the wall. · Remove the modulator deck from the chassis. · We will be working only with the speech amp for this mod ...
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69 National HRO Receiver | Facebook
https://es-es.facebook.com/groups/465147077668889/
The National HRO receiver was the preferred receiver of various Allied during World War II to ... It's not uncommon for these sets to be modified a lot.
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70 ORDER granting with modifications 348 Receiver's Twelfth ...
https://docs.justia.com/cases/federal/district-courts/colorado/codce/1:2009cv02676/116269/354
Filing 354. ORDER granting with modifications 348 Receiver's Twelfth Application for Approval of Payment of Receiver's Fees and Expenses by Judge Christine ...
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71 Why shortwave receivers are still expensive IF
http://forums.radioreference.com/threads/why-shortwave-receivers-are-still-expensive-if.350332/
Consider a radio like the National HRO sold in 1930. ... is much easier to write and changes to the software can easily be downloaded.
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72 Radio Receiver - NETWORX SECURITY
https://www.networxsecurity.org/members-area/glossary/r/radio-receiver.html
In radio communications, a radio receiver (commonly called a radio) is an ... (called "The Edison effect"), which essentially modified an early light bulb.
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73 Icom IC-R8600 - The Spectrum Monitor
http://www.thespectrummonitor.com/Sep2017TSM.pdf
Icom IC-R8600 All-Band All-Mode Software Defined Receiver ... The reader assumes all risk in performing modifications or construction ...
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74 Low-noise receiver design - robkalmeijer.nl
https://www.robkalmeijer.nl/techniek/electronica/radiotechniek/hambladen/qst/1955/03/page20/index.html
We made the above test on a modified HRO-5, and found that internal set noise masked much of the weak-signal DX. In the course of testing this and other ...
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75 Receiver function results for station HRO in central Honshu ...
https://www.researchgate.net/figure/Receiver-function-results-for-station-HRO-in-central-Honshu-Receiver-functions-are_fig7_258645924
Download scientific diagram | Receiver function results for station HRO in ... and we suggest modifications to traditional S-ScS differential splitting ...
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76 Poor poor little National HRO Senior L76 - Philcoradio.com
https://philcoradio.com/phorum/showthread.php?tid=12058&pid=90636
Cleaned the contacts on the coil units. On the HRO all of the adjustment for the RF,Mixer,and Osc are made on the coil units not on the receiver ...
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77 All icom mods - adaptare.me
https://adaptare.me/all-icom-mods.html
The modification only works on European models and by removing 2 diodes the ... ICOM IC-R75 Shortwave Amateur Radio Receiver w/UT-106 DSP***LATE SERIAL ...
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78 Military Radio and Communication Receivers
http://www.vintageradio.me.uk/military/military.htm
The National HRO,HRO-M and HRO-MX. Alignment Data. HRO ... This link is for the Radio Constructors Magazine R1155 modification.
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79 National HRO-600 - RigPix
https://www.rigpix.com/national/hro600.htm
Last modified 2014-03-17. National HRO-600. A picture of National HRO-600 ... Receiver system: Single conversion superheterodyne (below 1 MHz) IF: 5 MHz
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80 Hallicrafters SX-28 Restoration - Thomas Bonomo K6AD
https://californiahistoricalradio.com/restorations/hallicrafters-sx-28-restoration/
We plan to remove the mod than find the hum. This mod has connections to many locations in the receiver and I am not sure if I have the correct print for the sx ...
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81 National RCE - KN4R
https://www.kn4r.com/kn4r/RCE.html
The National RCE receiver was built for Airport use beginning in 1937. The RCE series is unusual ... Next Next next. Modified NC-100 for Airport Use circa 1937.
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82 Servicing A National PW-D Micrometer Dial and PW Gear Drive
https://aa7ee.wordpress.com/2015/02/09/servicing-a-national-pw-d-micrometer-dial-and-pw-gear-drive/
This whole page is packed with very useful information on National HRO Receivers, and their restoration. Henry WA7YBS runs the Western ...
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83 National HRO-500 - Red Wave Radio
http://www.redwaveradio.com/4_5c5a9f8e40565aea_1.htm
calibration is correct requires a bit of fiddling! It's really a very lively receiver, with terrific audio. Any ideas or suggestions would be ...
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84 National HRO Original Wood Band Coil Box for 4 Band Coils #5
https://ke9pq.com/national-hro-original-wood-band-coil-box-for-4-band-coils-5/
National HRO JE, Band Coil .9 to .205 MHz, for HRO-5, HRO-W and several Other Early National Receivers #3 ... Was: This National HRO ...
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85 Absolute Auctions & Realty
https://aarauctions.com/servlet/Search.do?&page=644&perPage=100&orderBy=
#1403 – National Radio Company HAM radio receiver model HRO-60 "Sixty" having coil ... incl TMS touch tone decode, power supply, five "puff receivers", etc.
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86 CEQA ADDENDUM - Granicus
https://belmont-ca.granicus.com/MetaViewer.php?view_id=1&clip_id=442&meta_id=27077
requirements for conducting floor area transfers within the HRO-2 Zoning District. ... changes to a project occur after an EIR has been adopted.
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87 Super Selectivity for Your Receiver, August 1965 Popular ...
https://www.rfcafe.com/references/popular-electronics/super-selectivity-receiver-popular-electronics-august-1965.htm
Three of the most significant changes that can be made to older receivers to improve sensitivity are to clean up the power supply DC output, ...
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88 Overloading: The Xiegu X6100's biggest negative - Q R P e r
https://qrper.com/2022/01/overloading-the-xiegu-x6100s-biggest-negative/
Receiver overloading. Let's face it: receiver strong signal handling and overload performance are important factors when you choose a radio. No ...
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89 Icom 706 11 meter mod. The IC-706MKIIG is very ICOM IC ...
http://foameonline.com/nnbl/icom-706-11-meter-mod.html
The IC-706MKIIG is very ICOM IC-706MK2G TX EXPAND MOD I ordered this radio ... Meter Mod New technology is changing the way receivers are being designed and ...
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90 Untitled
https://vcey.bassibike.it/ar7-modifications.html
4 Mb) AR7 receiver modifications in Amateur Radiomagazine (10. ... bears an extremely close resemblance to the National HRO receiver.
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91 NATIONAL HRO RECEIVER POWER SUPPLY TYPE 697
https://www.worthpoint.com/worthopedia/national-hro-receiver-power-supply-521215748
NATIONAL HRO RECEIVER POWER SUPPLY TYPE 697 - RESTORATION OR REBUILD - WW2 RADIO Description: Here we have an original HRO power supply in the classic 'Dog ...
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92 A National Radio HRO-500 Restoration Story Stuart D ...
https://hobbydocbox.com/85272749-Radio/A-national-radio-hro-500-restoration-story-stuart-d-rumley-ki6qp-redwood-city-ca.html
The output signal should be around 0.5Vrms, which corresponds to a gain of 80dB for the 2 nd IF. The total receiver gain should be about 100dB so that leaves ...
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