[Johnson] Tube Designation

[jeremy-ca]

Well, if I had someone tell me that any of my phasing rigs sounded like a 
ricebox I'd be highly insulted. And then figure out what I had done wrong.

Carl
KM1H


----- Original Message ----- 
From: "James M. Walker" <chejmw at buffalo.edu>
To: <johnson at mailman.qth.net>
Sent: Tuesday, April 22, 2008 10:16 PM
Subject: Re: [Johnson] Tube Designation


> Time to weigh in here,
> I acquired the HT-37, a pair of Pacemakers. W/ Thunderbolts, and I
> also have TX-1 (Apaches), w/SB-10 SSB adapter, and even a DX-100B
> with the additional SB-10. Never had any problem with the suppression
> or tune-up. Signal reports on air on all modes, were/are complimentary
> no complaints, with statements like "Sounds like one of the new solid 
> state rigs".
>
> Never any problems with carrier suppression, drive levels to the amps,
> in the case of the Heathkit gear the amplifiers are a pair of HA-10
> Warriors. Course as always YMMV, FWIW!
>
> Jim
> WB2FCN
> eshop1.chem.buffalo.edu
>
>
> ----- Original Message ----- 
> From: "Artmouton" <k5fnq at cox.net>
> To: <dhallam at rapidsys.com>; "Langston, Mike" <MLangston at HCPRICECO.com>; 
> "Peter Markavage" <manualman at juno.com>
> Cc: <johnson at mailman.qth.net>
> Sent: Tuesday, April 22, 2008 7:35 PM
> Subject: Re: [Johnson] Tube Designation
>
>
>> Not the one I used as a general many years ago.  It always had good 
>> sounding audio, at least that is what other hams would tell me.
>> Art K5FNQ
>>
>> ----- Original Message ----- 
>> From: "David C. Hallam" <dhallam at rapidsys.com>
>> To: "Langston, Mike" <MLangston at HCPRICECO.com>; "Peter Markavage" 
>> <manualman at juno.com>
>> Cc: <johnson at mailman.qth.net>
>> Sent: Tuesday, April 22, 2008 2:55 PM
>> Subject: RE: [Johnson] Tube Designation
>>
>>
>>> What about the Hallicrafters HT-37?  Since it uses an almost identical
>>> system, is the carrier balance as difficult to achieve and maintain with 
>>> it?
>>>
>>> David
>>> KC2JD/4
>>>
>>>> -----Original Message-----
>>>> From: johnson-bounces at mailman.qth.net
>>>> [mailto:johnson-bounces at mailman.qth.net]On Behalf Of Langston, Mike
>>>> Sent: Tuesday, April 22, 2008 3:04 PM
>>>> To: Peter Markavage
>>>> Cc: johnson at mailman.qth.net
>>>> Subject: RE: [Johnson] Tube Designation
>>>>
>>>>
>>>> Last time I tuned a Pacemaker was 1978. I was feeding a T-bolt and
>>>> remember that I couldn't depend on the Pacemaker meter for accurate
>>>> carrier null. I had an output meter downstream of the T-bolt and nulled
>>>> for minimum reading on the output meter. I don't remember what tubes
>>>> were in it.
>>>>
>>>> Mike KL7CD
>>>>
>>>> -----Original Message-----
>>>> From: johnson-bounces at mailman.qth.net
>>>> [mailto:johnson-bounces at mailman.qth.net] On Behalf Of Peter Markavage
>>>> Sent: Tuesday, April 22, 2008 12:48 PM
>>>> To: Johnson at mailman.qth.net
>>>> Subject: Re: [Johnson] Tube Designation
>>>>
>>>> I seem to remember when I had the 12AT7's in the Heath SB-10, I had to
>>>> constantly ride the carrier null pots with each transmission. Replacing
>>>> the tubes with 6201's and replacing the null pots with 10 turn devices
>>>> cured that problem along with the improved carrier suppression.
>>>>
>>>> Pete, wa2cwa
>>>> http://www.manualman.com
>>>>
>>>> On Tue, 22 Apr 2008 13:21:19 -0400 "David C. Hallam"
>>>> <dhallam at rapidsys.com> writes:
>>>> > Pete,
>>>> >
>>>> > I can't seem anything one way or the other.  Right now the Pacemaker
>>>> > is a
>>>> > work in progress.  When I am finished refurbishing maybe I will run
>>>> > some
>>>> > tests.  I can try a 12AT7, ECC-81, 6201, and any other MilSpec
>>>> > variants I
>>>> > can get my hands on and look the carrier and side band suppression
>>>> > on my
>>>> > spectrum analyzer.
>>>> >
>>>> > David
>>>> > KC2JD/4
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>>>>
>>>>
>>>>
>>>>
>>>
>>>
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>>
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>>
>
>
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