Midget Comunication Receiver MCR1 - UK Vintage Radio Repair and Restoration Discussion Forum

Kitradiocompany · 28th Oct 2018, 1:12 pm

MCR1. Designed by Major J Brown and built by Philco. Ive owned this one for many years, every so often I dust it off and give it a run. This time round I had to replace one of its valves.

Click on the link to see it working.

https://www.***********/photos/795803...7630114126470/

There's a series of photos in this album. Including details of my hombrew power supply.

https://www.***********/photos/795803...h/31123915448/

Tony Westbrook.

HamishBoxer · 28th Oct 2018, 1:22 pm

Very nice too.

trh01uk · 29th Oct 2018, 8:54 am

Tony,

thank you for posting that. Its always interesting to see a historic bit of kit actually working. I didn't see a reference to the aerial you were using - so I was bit surprised that Volmet was so faint - which of course may have nothing to do with the MCR1 and a lot to do with the aerial and the propagation on the day you did the film.

I note too the high IF of the MCR1 - 1.7MHz - at least it was high for the 1940s. They must have been concerned about image responses when they had very little room for decent RF stage filtering and did the obvious thing, and raised the IF. Funny how long it took for that idea to catch on!

Richard

28th Oct 2018, 1:12 pm	#1
Kitradiocompany Retired Dormant Member Join Date: Sep 2011 Location: Westerham, Kent, UK. Posts: 3	Midget Comunication Receiver MCR1 MCR1. Designed by Major J Brown and built by Philco. Ive owned this one for many years, every so often I dust it off and give it a run. This time round I had to replace one of its valves. Click on the link to see it working. https://www.*********/photos/795803...7630114126470/ There's a series of photos in this album. Including details of my hombrew power supply. https://www.*********/photos/795803...h/31123915448/ Tony Westbrook.

28th Oct 2018, 1:22 pm	#2
HamishBoxer Dekatron Join Date: Aug 2007 Location: W.Butterwick, near Doncaster UK. Posts: 8,935	Re: Midget Comunication Receiver MCR1 Very nice too. __________________ G8JET BVWS Archivist and Member V.M.A.R.S

29th Oct 2018, 8:54 am	#3
trh01uk Octode Join Date: Nov 2010 Location: Ross-on-Wye, Herefordshire, UK. Posts: 1,654	Re: Midget Comunication Receiver MCR1 Tony, thank you for posting that. Its always interesting to see a historic bit of kit actually working. I didn't see a reference to the aerial you were using - so I was bit surprised that Volmet was so faint - which of course may have nothing to do with the MCR1 and a lot to do with the aerial and the propagation on the day you did the film. I note too the high IF of the MCR1 - 1.7MHz - at least it was high for the 1940s. They must have been concerned about image responses when they had very little room for decent RF stage filtering and did the obvious thing, and raised the IF. Funny how long it took for that idea to catch on! Richard