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

[Carl]

----- Original Message ----- 
From: "Roger (K8RI)" <hallicraftersgroup at rogerhalstead.com>
To: "Carl" <km1h at jeremy.mv.com>
Cc: "Hallicrafters" <hallicrafters at mailman.qth.net>
Sent: Monday, November 17, 2008 7:01 PM
Subject: Re: [Hallicrafters] Re: [Boatanchors] simple transmitter using 
the1625 tube


> Carl wrote:
>>
>> ----- Original Message ----- From: "Roger (K8RI)" 
>> <hallicraftersgroup at rogerhalstead.com>
>> Cc: "Hallicrafters" <hallicrafters at mailman.qth.net>
>> Sent: Monday, November 17, 2008 2:58 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.
>>
>>
>> It was manufacturer specific Roger; out of all the vendors I believe 
>> it was only 2-3 that were modifiable for GG. I still have a few in 
>> the tube stash with the slot I cut so I could seperate the leads. A 
>> 10A driving one driving 4 worked well 80-20M for me for a short 
>> period when I was between AM and SSB and had both available. Then 
>> came the HT-37, 2B, 2x 4-400's and a 100V, 75A4, and NCL-2000 in 
>> 1964. I always preferred phasing rigs for the audio quality. 
>> Finishing up a GSB-100 restoration now but I do get nice reports with 
>> the HT-32B/SX-115 and that same NCL-2000.
>>
>> Modified 1625's still show up at hamfests with the seller usually not 
>> having a clue. It depends upon if the seller or others standing 
>> around have gray hair when I try to explain the purpose of the 
>> "butchery". No gray hair gets a glazed look for a response; I guess 
>> those tubes didnt get used on CB or 2M FM (;
> That was IIRC just about the time CB was getting under way and I don't 
> think "home brewing" was very common <:-))
>
> As to 2-meters, that was the time of the "Lunch Box".  They worked 
> great mobile as long as you didn't get too close to the other car.
> 73
>
> Roger (K8RI)
>
>>
>> Carl
>> KM1H


> That was IIRC just about the time CB was getting under way and I don't 
> think "home brewing" was very common <:-))

Au contraire. Many first pass CBers were upset and protesting hams and 
it took the FCC and ARRL together to get some of the 100W to KW rigs off 
11M. I had 2W1949 issued and ready for the first day of CB with a 
DX-100. In the NYCLI area 11M was an active mobile band that didnt get 
clobbered by QRM as bad as the much more popular 10M band. This was the 
peak of Cycle 19 and 10 almost never closed.

I dont remember many Twoers being in use in the early 60's. ARC-3's , 
ARC- 5's plus SCR 522's were pretty common as well as Gooney Boxes. I 
had a HB 2E26 on  2M and later an 829B rig. I went SSB around 65-66 with 
HB RX/TX converters driven by a 10B. A 10A drove 6M versions.

To this day I still do a lot of homebrew, from tubes to microwave SS.

Carl
KM1H