To: <amps@contesting.com>
>Date: Fri, 21 Mar 2003 13:12:23 -0500
>To: 2 <2@vc.net>
>From: Bill Fuqua <wlfuqu00@uky.edu>
>Subject: Re: [Amps] Up thru the CB ranks
>
>1625 were of two types one of had the beam forming plate connection
>inside the envelope
>the other had two separate wires coming thru the envelope seal into the
>base. Both were
>soldered into the same pin. You could carefully drill a hole over the
>cathode pin into the side of the base
>and remove one of the two wires and insert into a spare pin. I heated the
>bases to remove break free
>the glue and then rewired them. The problem then was finding a glue that
>would work well to
>reattach the base. Another time I used a saw and carefully sawed a slot
>around the base and
>just used tape to hold them together afterwards.
> Today RTV is the stuff to use. It is flexible and good for high
> temperatures.
>
>
>73
>Bill wa4lav
>
>
>
>
>At 09:12 AM 3/21/2003 -0800, 2 wrote:
>>good reasoning. congrats.
>> How about 1625s in g-g.?
>>
>> >An 807 would probably oscillate cathode driven due to the fact that the
>> >suppressor (beam forming plates) are
>> >connected to the cathode internally thus providing a lot of plate to
>> >cathode capacitance. The choice of going
>> >to grid driven is not bad at all.
>> >
>> >73
>> >Bill wa4lav
>> >
>> >
>> >
>> >At 10:29 PM 3/16/2003 -0500, you wrote:
>> >>----- Original Message -----
>> >>From: "Bill L. Fuqua" <wlfuqu00@uky.edu>
>> >>To: <garyschafer@attbi.com>
>> >>Cc: <amps@contesting.com>; <n1rj@pivot.net>
>> >>Sent: Sunday, March 16, 2003 6:45 PM
>> >>Subject: Re: Re: [Amps] Membership
>> >>
>> >>
>> >> > Unfortunately there are a number of hams that came up thru the CB ranks
>> >>
>> >>Yes, I'll confess to that...some 30 years ago. All my CB buddies, building
>> >>GG sweep tube amps, told me that anything grid driven would be unstable,
>> >>oscillate, and just be unusable. That was just the motivation I needed
>> to go
>> >>ahead with building a four 807 amp. They were right, it was quite the
>> >>oscillator. Then I learned about neutralization and parasitic suppressors.
>> >>Soon those 807's were running smooth as silk. At the time I was working on
>> >>my ham ticket, but CB was there and it was a place to experiment with RF.
>> >>Once I got my ticket I traded the amp for a 50' tower, but I sometimes
>> >>wonder what ever became of that amp. It was a beauty...there is something
>> >>about 807's...a romantic type something...
>> >>
>> >>Jeff - K1LE - CT ><>
>> >>_______________________________________________
>> >>Amps mailing list
>> >>Amps@contesting.com
>> >>http://lists.contesting.com/mailman/listinfo/amps
>> >
>> >_______________________________________________
>> >Amps mailing list
>> >Amps@contesting.com
>> >http://lists.contesting.com/mailman/listinfo/amps
>> >
>>
>>
>>- R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K,
>>www.vcnet.com/measures.
>>end
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