>I remember many old tube transceivers that did not have any stabilized g2
>voltage in the final and it worked fine. My old TX44XB for example. It sure
>sounds fine and was once good enough OK for Swedish State Dept using many of
>them as TR44s. This was a R4B+T4XB in the same case.
>
The TS-830S has the lowest IMD of any transceiver, yet it does not have a
regulated screen supply. Why? The screen supply is fairly stiff and
the Final Unit incorporates RF-NFB
>One of the best sounding rigs ( ICOM IC 701 ) did not even have a stabilized
>13.5 voltage but just a huge reservoir condenser. Yes, it had mains ripple
>on cw and a very dirty synthezizer but it had a special sound very easy to
>recognize.
? So did spark transmitters, Hans. cheers
>
>Hej daa de Hans SM5KI
>
>----------
>>FrÂn: measures <measures@vcnet.com>
>>Till: <gdaught6@leland.Stanford.EDU>, "AMPS" <amps@contesting.com>
>>?mne: Re: SV: SV: [AMPS] Tetrode Amp Help
>>Datum: fre 10 dec 1999 17.36
>>
>
>>
>>>
>>>
>>>Hi all,
>>>
>>>> >Thanks for info. Of course you need always a high frequency screen grid
>>cap
>>>> >or grounded g2. But you did not get my point: if your g2 voltage is
slowly
>>>> >following your SSB-signal you do not get envelope distorsion but a slow
>>gain
>>>> >variation.
>>>>
>>>> I do not agree. When the screen / G2 voltage is not held constant,
>>>> distortion results.
>>>
>>>I'm with Rich on this. "A slow gain variation" is a nonlinearity!
>>>Whether it is small enough to be unimportant, i.e. legally acceptable
>>>is another question, but why not use a stiff regulator and avoid this
>>>source of distortion?
>>>
>>indeed, George. G2 DAF amplifer salesmen seem to be somewhat DAFt.
>>They are sort of like inventors of 400mpg carbs for autos.
>>
>>cheers
>>
>>
>>- Rich..., 805.386.3734, www.vcnet.com/measures.
>>
>>
>>--
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>>
>>
>
- Rich..., 805.386.3734, www.vcnet.com/measures.
--
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