[Clegg] Hello Clegg owners.

[Carl]

The 8236 is octal based.

With care and socket changes, a pair of 6LQ6 size sweep tube's can be 
made to work on 6M. Dont overlook the 25V series string sweep tubes, 
dirt cheap and a small filament xfmr is also cheap.

I dont know the space available but a pair of 4D32's is another 
possibility.

Id try to stay away from forced air cooling headaches.

Is there room for conduction cooled tubes?  The 8072 comes to mind, also 
dirt cheap.

Carl
KM1H



What key down plate voltage does the amp use?
----- Original Message ----- 
From: "Peter A Markavage" <manualman at juno.com>
To: <BakerF at wsdot.wa.gov>
Cc: <clegg at mailman.qth.net>
Sent: Monday, March 02, 2009 4:53 PM
Subject: Re: [Clegg] Hello Clegg owners.


> Fred:
> As I indicated in the previous e-mail, and I think we either talked 
> about
> this (was it Dayton(?), on the phone(?) years ago), I don't have any 
> info
> on the Apollo conversion. It might have originated from someone who 
> was a
> member of the Pack Rats VHF club and might have even been published in
> one of their newsletters  but I don't really know. The conversion
> probably is not rocket science but I haven't had any time or ambition 
> to
> reverse engineer and document the change. The 8236's were nothing more
> then sweep tubes. Conversion to 6JE6's, or something similar 
> (something
> that uses the same tube socket), probably wouldn't be that hard to do.
> Heck, you would probably drop in a pair of octal sockets and use 
> 6146's
> at reduced PEP.
>
> Pete, wa2cwa
>
> On Mon, 2 Mar 2009 13:26:57 -0800 "Baker, Fred" <BakerF at wsdot.wa.gov>
> writes:
>> KA1KAQ Todd,
>> I also have a prototype Comet that I would love to complete. I have
>> several 22er Mark 2's so I can get some of the mechanical parts but
>> I don't have a manual. I also have a 62T10 that someone converted to
>> a 2 meter amplifier and though I have the manual, I would love to
>> get pictures of the "guts" (especially the final circuits) to help
>> in my restoration.
>>
>> WA2CWA Pete,
>> Do you have any documentation on the Apollo with the 4X150's? One of
>> my 5 Apollo's was converted and I could not find anything on it
>> though I was told there was a published article on the conversion. I
>> have also found a source for some 8236 tubes while I was in Orlando
>> this year. Vacuum Tubes Inc in Orlando
>> (http://www.vacuumtubesinc.com/) has some for a reasonable price
>> (about $50 per tube) and though they are not NOS they looked good on
>> the tester. The owner; Jim Cross; believes that they came from a
>> military acceptance test lot so probably very low hours. It is a
>> good thing Ed didn't go with the design of the prototype Apollo I
>> have. It used 3 of these hard to find tubes.
>>
>>
>>
>>
>>  Fred Baker W7SIX
>>
>> Electronic Design Engineer
>>
>> ITS Communications & Wireless Technology
>>
>> 360-705-6926
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