VFO Circuit using Space Charge Tube?

[David C. Hallam]

Back in the early 1950's when I was messing around with model airplanes, we
used a subminiature gas tube in the receivers with a 22.5V battery for the
plate supply for RC airplanes.  As I recall they were made by Sylvania and
had originally been developed for use in WWII proximity fuses.  This was
back when the first Citizens Band had been authorized.  We used 27.255 MHz.
I think I still have some of the crystals around I used in the transmitters.

David
KC2JD/4

> -----Original Message-----
> From: Boat Anchor Owners and Collectors List
> [mailto:BOATANCHORS at LISTS.TEMPE.GOV]On Behalf Of kd4e
> Sent: Tuesday, September 30, 2008 8:24 PM
> To: BOATANCHORS at LISTS.TEMPE.GOV
> Subject: VFO Circuit using Space Charge Tube?
>
>
> Anyone have a good VFO circuit for a HF transmitter
> that uses a "Space Charge" or other 12vdc tube?
>
> I did a bunch of online research on Space Charge tubes,
> pencil tubes, and low voltage subminiature tubes.
>
> The closest thing was this 12vdc tube QRP transmitter
> using a 12AC6 crystal oscillator and a 12J8 buffer
> http://ja9ttt.homedns.org/hamf/myexp/12V_Tube_QRPp_Transmitter.html
>
> The Japanese-to-English translation is rough but from
> the schematic and text does anyone see any reason that
> this could not be converted to a multi-band HF VFO?
>
> Here are the other low-voltage tube links that I found:
> http://kd4e.com/pp.html
>
> --
>
> Thanks! & 73, doc, KD4E
> FS/Swap/Wanted: http://kd4e.com/swapn.html
> Free OS : http://www.PuppyLinux.com
> Personal: http://kd4e.com
>              |_|___|_|
>              | | & | |
>         /\      {|
>        /  \     {|
>       /    \    {|
>      /   @  \   {|
>      |   |~_|~~~~|
>      |   -| |    |
> ============\ # KD4E
> Have an http://ultrafidian.com day!
>
> -----------------------------------------------------------
> This list is a public service of the City of Tempe, Arizona
> -----------------------------------------------------------
>
> Subscription control -
http://www.tempe.gov/lists/control.aspx?list=BOATANCHORS
To post - BOATANCHORS at LISTS.TEMPE.GOV
Archives - http://lists.tempe.gov/archives/BOATANCHORS.html

-----------------------------------------------------------
This list is a public service of the City of Tempe, Arizona
-----------------------------------------------------------

Subscription control - http://www.tempe.gov/lists/control.aspx?list=BOATANCHORS
To post - BOATANCHORS at LISTS.TEMPE.GOV
Archives - http://lists.tempe.gov/archives/BOATANCHORS.html