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Old 11th Sep 2006, 1:17 pm   #1
kalee99
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Default wartime one valve set

Hi all,
I am about to experiment with one valve sets and I belive that during WW2 some people built sets of very simple nature to use in the air raid shelter.
I have a circuit here I am thinking of trying which will only need a 12 volt (car battery) supply for HT & LT.
Any suggestions or alternatives most welcome.
Paul.
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Old 11th Sep 2006, 1:41 pm   #2
wireless_paul
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Default Re: wartime one valve set

Quote:
Originally Posted by kalee99 View Post
Hi all,
I am about to experiment with one valve sets and I belive that during WW2 some people built sets of very simple nature to use in the air raid shelter.
I have a circuit here I am thinking of trying which will only need a 12 volt (car battery) supply for HT & LT.
Any suggestions or alternatives most welcome.
Paul.
I used to have a one valve radio that was built in WW2. LT was 1.5V and HT was 9V. Sadly I no longer have it, took it to pieces I think!
Paul
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Old 11th Sep 2006, 4:26 pm   #3
JHGibson
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Default Re: wartime one valve set

Hi Paul,
In the BVWS Bulletin for Spring 2005 Vol 30 #1, there is an article titled "Sixty Years Ago in New Zealand" which puts the time frame in the early 40's.
Anyway the author includes circuits for two one valve radios which he called "Hikers" radios. The first circuit is quite conventional but uses only 9 V HT. The second is more interesting in that the control grid G1 is connected to +1.5 V to encourage electron flow from the filament and G2 is used as a control grid. HT is also +9 V in this set.
John.
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Old 11th Sep 2006, 4:40 pm   #4
mickjjo
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Default Re: wartime one valve set

There is loads of information on the various incarnations of the "Hikers" sets here:-

http://www.oldradios.co.nz/hikers/

Regards, Mick. .
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Old 11th Sep 2006, 5:45 pm   #5
kalee99
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Default Re: wartime one valve set

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Originally Posted by mickjjo View Post
There is loads of information on the various incarnations of the "Hikers" sets here:-

http://www.oldradios.co.nz/hikers/

Regards, Mick. .
Hi,
lots of circuits to try here
Thanks.
Paul.
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Old 11th Sep 2006, 7:24 pm   #6
JHGibson
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Default Re: wartime one valve set

Paul, there is a one valve radio specifically designed to run off a car battery at
www.webex.net/~skywaves/homebrew/12Vregen.htm
John.
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Old 11th Sep 2006, 8:32 pm   #7
kalee99
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Smile Re: wartime one valve set

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Originally Posted by JHGibson View Post
Paul, there is a one valve radio specifically designed to run off a car battery at
www.webex.net/~skywaves/homebrew/12Vregen.htm
John.
Just what I am looking for
Paul
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Old 16th Sep 2006, 10:19 am   #8
boiss
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Default Re: wartime one valve set

When I was a lad a few years back, I only had a mains heater transformer as a possible power source (6.3V). I made many single valve regens using any S.H. valves I could find. I found that the audio pentodes/tetrodes worked best including the 6V6 on around 9V Ht. Later I used a voltage doubler to give me around 15V and better performance. The battery valves such as DL96 etc worked very well.
Have fun,
Mike.
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