[Hallicrafters] Re: [Boatanchors] simple transmitter using the1625 tube

[Paul Kraemer]

FWIW IMHO Most 1625 have supressor tied to cathode inside the glass.
National Union and one or two others are only ones that did it so they could 
be modified for gg
They were used by Lakeshore in LA400C as an upgrade to 837 (which was 
probably quite an under rated version of 807)
Very common to pair that linear with CE 20A for about 400 watts.
Those were the good times.
Paul K0UYA
----- Original Message ----- 
From: "Roger (K8RI)" <hallicraftersgroup at rogerhalstead.com>
Cc: "Hallicrafters" <hallicrafters at mailman.qth.net>
Sent: Monday, November 17, 2008 1:58 AM
Subject: Re: [Hallicrafters] Re: [Boatanchors] simple transmitter using 
the1625 tube


> Posted only to the Hallicrafters group.
>
> Carl wrote:
>>
>> ----- Original Message ----- From: "Al Klase" <al at ar88.net>
>> To: "n0alo" <n0alo at kans.com>
>> Cc: "boatanchor" <boatanchors at mailman.qth.net>; "Homebuilt" 
>> <homebuilttuberadios at yahoogroups.com>; "Hallicrafters" 
>> <hallicrafters at mailman.qth.net>; "Regenrec" <regenrx at yahoogroups.com>
>> Sent: Sunday, November 16, 2008 10:09 PM
>> Subject: Re: [Boatanchors] simple transmitter using the 1625 tube
>>
>>
>>> Keep in mine this is fundamentally an 807 with a 12-volt heater and the 
>>> suppressor grid brought out separately rather than being tied to the 
>>> cathode.
>>>
>>> Al
>>
>> The suppressor is tied to the cathode inside the glass on most 1625's and 
>> inside the base on a few. Those latter ones were modified for GG 
>> operation in the late 50's.
> Back in the 60's they were real popular for a couple hundred watts 
> out...maybe 500 PEP for some really pushing them, but most I saw had the 
> connection in the base with only a few in the tube. Of course it probably 
> depends on what batch they came out of or who made them. This was all in 
> one area so it's indeed possible the ones I saw all came out of one or two 
> batches.
>
> IIRC the single tube transmitters tended to chirp a lot without a buffer 
> stage.
>
> 73
>
> Roger(K8RI)
>>
>> You may be thinking of the837.
>>
>> Carl
>> KM1H
>>
>>
>>>
>>> n0alo wrote:
>>>> Know this is a bit off topic but does anyone know of plans/build it 
>>>> articles using
>>>> the 1625 tube for a simple one tube crystal controlled low power cw
>>>> transmitter?
>>>> Many thanks
>>>> Lynn
>>>> ------------------------------------------------------------------------
>>>>
>>>>
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>>>
>>> -- 
>>> Al Klase - N3FRQ
>>> Jersey City, NJ
>>> http://www.skywaves.ar88.net/
>>>
>>> _______________________________________________
>>>
>>
>> ______________________________________________________________
>>
>
> ______________________________________________________________