UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Questions on 160/80 metre AM transmitters.

Cruisin Marine · 21st Dec 2022, 9:50 pm

I'm sure that Codar thought it was a good selling point to make it so compact, but that was always going make the thermal side tricky. It will probably be a challenge to make a clone with same valves and in the same volume that does much better?

If I were to make a present day version I would def use a PLL/Synth to eradicate that problem. It may not be original, but what the hell- the rest can be.

There were two other small top band transmitters that come to mind. The TW Communications Topbander and the KW160. The TW was quite compact from the photos I've seen of it.

Paula

Sadly, it is neither of those I refer to in my post above. It also had 80m capability (the O/P was about half on there), I think the PA was a 6BW6 or similar, looking back, I never did know the make, although it had a model number on it somewhere. It was very similar in size to the Codar though. It had a Belling Lee antenna socket I recall (which I changed for BNC).

21st Dec 2022, 9:50 pm	#50
Cruisin Marine Octode Join Date: Jul 2018 Location: Worthing, West Sussex, UK. Posts: 1,002	Re: Quick question on the CODAR AT5, if anyone has one to hand. I'm sure that Codar thought it was a good selling point to make it so compact, but that was always going make the thermal side tricky. It will probably be a challenge to make a clone with same valves and in the same volume that does much better? If I were to make a present day version I would def use a PLL/Synth to eradicate that problem. It may not be original, but what the hell- the rest can be. There were two other small top band transmitters that come to mind. The TW Communications Topbander and the KW160. The TW was quite compact from the photos I've seen of it. Paula Sadly, it is neither of those I refer to in my post above. It also had 80m capability (the O/P was about half on there), I think the PA was a 6BW6 or similar, looking back, I never did know the make, although it had a model number on it somewhere. It was very similar in size to the Codar though. It had a Belling Lee antenna socket I recall (which I changed for BNC). __________________ "Behind every crowd, there's a silver Moonshine"