G4NSJ - National HRO 5TA1 5A1 R106 mk1 mk2 comms receiver - part six

In this video, I talk about the coil packs, IF alignment, the AGC switch, a strange modification and lots more.
In my reference to the RSGB article, I should say 1959, not 1937.

[@G4WTV]

Another fascinating video Ray. I so much enjoy these update videos about the HRO. It was such a pleasure to talk to you on top-band this afternoon and hear myself on your HRO while we had a duplex conversation, with you on 2 meters.

[@g4nsj]

Thanks, Roy. Crossband GB3RW to 160metres... People don't seem to do that sort of thing these days. It was a great QSO. We're keeping the hobby alive! I've just heard Mid Downs radio on 1350KHz from the Princess Royal Hospital, Haywards Heath. Cheers, Ray.

[@kc8aro66]

So far a great journey on this project and great simple explanations foe ANY viewer, cheers! 73 from USA🇺🇸

[@g4nsj]

@@kc8aro66 Thanks for your kind comment. Cheers, Ray.

[@terryspears2307]

Ray, I commented last video about a move here in the US to eliminate AM radios in new cars. I did just a little internet research about this. The car manufacturers evidently are having trouble with interference from the electric motors on EVs. There is so much interference from all of the cheap switching power supplies in our home devices it is hard to get a clean signal. My new washing machine produces bad interference on my AM radio in my shop. When my wife heats water in her Keurig coffee maker, it completely wipes out my AM radio while boiling the water. I am sure big money of the car industry will win out. Take care, I enjoy your channel, I no longer do any electronic repair retired now for 11 years, but I understand everything you are talking about. I spent 42 years working in industrial controls, land based microwave and commercial two-way radio systems.

[@g4nsj]

Yes, I remember you comment about AM car radios. Interesting about the EVs. Crikey! Even more interference! I use a miniwhip active antenna for medium wave DXing, which is pretty good. Enjoy your retirement! Cheers, Ray.

[@K4VTE1818]

I'm enjoying your journey. Thank you

[@g4nsj]

It's rather a long journey!

[@JustinPartridge-v3f]

That's a very nice radio you doing a brilliant job with it

[@g4nsj]

Thanks, Justin!

[@Paddy_Roche]

"Peyton Place". 🤣😂🤣 Oh, my Days, Ray. Well, another informative video, thank you, you make them Ray and we'll watch them. Take care and see you for the next one.

[@g4nsj]

@@Paddy_Roche Great to hear from you. More videos coming soon! 👍

[@barrywendon5168]

TNX Ray another good video those were the days vales . Brought up on vales good set the HRO 73 de G6JMX

[@g4nsj]

Good to hear from you. Love valves!

[@Nicktgrief]

I look forward to the Christmas day edition 🤣. I fully agree with you Ray, always best to assume you're talking to a novice. then everyone knows whatswhat.

[@g4nsj]

Hi Nick, Christmas 2025 at this rate! Cheers, Ray.

[@bilbp41]

Don’t ever worry about thinking that you’re explaining too much you do a brilliant job and even non-registered blind. I know exactly what you’re talking about. I love my vintage radios but I also love my transistor radios so don’t worry about what other people think what you think is right for the video is right for you, honest I wish I had your skills

[@g4nsj]

Thanks for your kind comments, it's good to hear from you. I remember when transistor radios first came out. Happy days! Cheers, Ray.

[@101jumpit]

Love the video's Ray,you just keep them coming :)

[@g4nsj]

Thanks! I'm sure there will be more. Cheers, Ray.

[@RK-zg4en]

The year is 2030.......G4NSJ - National HRO 5TA1 5A1 R106 mk1 mk2 comms receiver - part 137. lol Really enjoying the project Ray. 73, Rick VK5RI

[@g4nsj]

Part 137... Crikey! Imagine that! Haha, great stuff. Cheers, Ray.

[@siti7797]

Ray, thank you for the videos. It's been educational for me❤

[@g4nsj]

Thanks! Nice to hear from you. Cheers, Ray.

[@ZAR797]

As far as I can remember, 500khz was or is a marine distress frequency. I'm enjoying the journey

[@g4nsj]

Yes, it was distress and CW working world wide. It's sadly missed... Cheers, Ray.

[@itsonlyme9938]

A few years ago I found a web page for the HRO giving a list of frequency's and dial setting versa frequency and printed it of on to A4 paper. covering most of the coil sets If you have seen a BC221 booklet its the very same idea. The site I think has been deleted.

[@g4nsj]

That would have been useful. There are quite a few sites with good information. It just takes time trawling through them all.

[@itsonlyme9938]

The Germans in WW2 copy the HRO They purchased the dial and tuning caps under the noses of National radio through Portugal. However they used German metal tubes

[@g4nsj]

@@itsonlyme9938 That’s interesting, thanks.

[@johnmilton7578]

When the restoration is complete are going to release the whole video series on DVD Ray? BBC Radio Guernsey runs 500 watts on AM. I am just along the coast from you in Ferring and can pick up Mid Downs Radio from Princess Royal Hospital, Haywards Heath on 1350 kHz. The only good thing about loosing the medium wave broadcast stations is the increase DX and low power reception.

[@g4nsj]

Hi John, That's a good idea, I'll put all the videos together. OK on Guernsey, thanks for the info. I'll take a listen on 1350 later. I like medium wave DXing, especially listening for low power stations. Cheers, Ray.

[@g4nsj]

Yes, I can hear the Princess Royal Hospital transmission Haywards Heath on 1350KHz. Weak but readable.

[@mikesmithg0rfd356]

i used a lm14 like bc221 too help adjust my hro mx

[@Joe-KN4IFI]

[@Theoobovril]

Strange how the receiver cuts out at a particular frequency when using that coil pack. Any clue in the fact that you get that static click when the receiver cuts out, Ray "?".

[@g4nsj]

It is interesting. I've yet to look into it properly.