[R-390] ballast tubes

[Francesco Sartorello]

It is so effective and neat to use two 12BA6 instead, that I refuse to buy a 
3TF7 at 3 USD, not to mention at 163 USD! Let the distributor keep them all 
six!
Francesco

----- Original Message ----- 
From: "Rbethman" <rbethman at comcast.net>
To: "R390 List" <r-390 at mailman.qth.net>
Sent: Tuesday, December 28, 2004 1:27 PM
Subject: Re: [R-390] ballast tubes


> Oh yes!
>
> One of the sources/distributors with a GRAND total of S-I-X (6) on hand, 
> SAYS you can order up to 99999 of them.
>
> They are PRICED at $163.00 - - - E--A--C--H
>
> Think I'll stick with the 10W sand resistor backup when the last 3TF7 
> dies!
>
> Bob - N0DGN
>
> > Dave Merrill wrote:
>
>>Amperite lists them as available, but when you call a distributor
>>they quote you over $100 per ballast.
>>
>>
>>>I notice according to Amperite website's  section on Amperite Ballast
>>>
>>tubes<http://www.amperite.com/Uploads/Ballasts.pdf> (PDF) they still have
>>the following ballast tubes in stock.
>>
>>>3TF7, 3TF7A, 3TF7B, 3TF7H.  There was another site I have not  re
>>>
>>discovered which is devoted to the restoration of tube
>>
>>>type guitar amp's.  Many of these amp's used ballast tubes.  One of the
>>>
>>sites had the calculations for a substitution using an small
>>>incandescent light bulb and a resister for the a ballast tube. I am still
>>>
>>looking......
>>
>                       Bob Bethman - N0DGN
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