[Boatanchors] Fw: New question

[J. Forster]

Take a look at the AES site. tubesandmore.com

-John

===============


>
>
>
>> BARRIE, there are 500 ohm to p-p class B grids  tx around, that is what
>> you need, a 15 t0 20 watt would be ok, maybe a 10 watt would work
>> if you could restrict the low freq of the voice.
>> old jack
>
> Well, Jack, I was hoping there was something like that still available.
> But
> I have not been able to find anything.  I'm sure that as recently as a few
> months ago Hammond had a transformer such as I need on their website, but
> I
> don't find it now.
>
> I don't think there would be anything wrong with just using a hifi output
> transformer.  All I need to know is the likely impedence of the grids of
> the
> 100THs.
>>
>> On Sun, 11 Apr 2010 14:43:10 -0600 "Barrie Smith" <barrie at centric.net>
>> writes:
>>> I'd like to thank everyone that helped with my "100 watt VFO"
>>> question.
>>>
>>> I have everything I need for the rig except the modulation driver
>>> transformer.
>>>
>>> I'd like to use an old Bogan tube-type amplifier for the speech amp.
>>>  It has outputs from 4 ohms to 600 ohms.  So, if I use that amp to
>>> drive a hi-fi output transformer "backwards", what would the output
>>> (normally input) impedence need to be to drive the grids of a pair
>>> of 100TH modulator tubes?  Also, what would the wattage need to be?
>>>
>>> Thanks & 73, Barrie, W7ALW
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