[Boatanchors] [FLBOATANCHORS] WTD: Sub-miniature tubes

Thu Jun 5 09:58:52 EDT 2014

Maybe those were the ones.  It was 60+ years ago and my memory a little, 
no make that a lot, foggy on the issue.

David
KW4DH

On 6/5/2014 9:22 AM, David Harmon wrote:
> RK61 or RK62 maybe?
>
>
> 73
>
> David Harmon
> K6XYZ
> Sperry, OK
>
> -----Original Message-----
> From: David C. Hallam [mailto:dhallam at knology.net]
> Sent: Thursday, June 5, 2014 6:24 AM
> To: David Harmon; FLBOATANCHORS at yahoogroups.com; boatanchors at mailman.qth.net
> Subject: Re: [Boatanchors] [FLBOATANCHORS] WTD: Sub-miniature tubes
>
> The ones I used were CK something and gas tubes.  My transmitter was a HB
> using a single tube on 27.255 mc as I remember.  Control was rudder only
> with an escapement and wound up rubber band for power. I had one plane with
> an engine and another was a glider.
>
> David
> KW4DH
>
> On 6/4/2014 10:36 PM, David Harmon wrote:
>> The 1AG4 and 6008 are wire lead tubes and both were used in early R/C
>> operation in the receivers....mainly super regen.
>> I still have a couple of the Babcock receivers I used back in the mid
>> 50's....they actually worked!
>> Both have 1.5vdc filament and used 30v on the plate.
>> The 6008 has half the fil current pf the 1AG4.
>> They are about 3/4" long and 3/16" thick.
>> They are not the so-called 'gas' tubes...these are vacuum tubes.
>>
>>
>> 73
>>
>> David Harmon
>> K6XYZ
>> Sperry, OK
>>
>> -----Original Message-----
>> From: Boatanchors [mailto:boatanchors-bounces at mailman.qth.net] On
>> Behalf Of David C. Hallam
>> Sent: Wednesday, June 4, 2014 8:38 PM
>> To: FLBOATANCHORS at yahoogroups.com; boatanchors at mailman.qth.net
>> Subject: Re: [Boatanchors] [FLBOATANCHORS] WTD: Sub-miniature tubes
>>
>> I don't have any, but weren't these the tubes used in the WWII
>> proximity fused ship board anti aircraft shells?  I also think I used
>> them in RC model airplane receivers I built back in the early 1950's.
>>
>> David
>> KW3DH
>>
>> On 6/4/2014 11:40 AM, bcarling at cfl.rr.com [FLBOATANCHORS] wrote:
>>> I could use a couple of subminiature, wire lead tubes like CK5672 or
>>> CK6612 or other subminiature "pencil" tubes. Prefer something I can
>>> make into a low power Pierce xtal osc. stage.
>>>
>>> I have plenty of other useful tubes to trade or will buy.
>>>
>>> Thanks - Bry, AF4K
>>>
>>> Brian Carling, Radio AF4K
>>>
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>> Before I came here I was confused about this subject.  Having listened
>> to your lecture I am still confused. But on a higher level.
>> Enrico Fermi
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