[TenTec] SB220-Tubes and QSK

[Paul Gates, KD3JF]

Well, braid my hair and call me Betsy.... I remember WHAM very well when we lived in Binghamton, NY ..

Gary Hoffman <ghoffman at spacetech.com> wrote: Don't forget WHAM....clear channel 50k watts for many many years....and they
ran water cooled tubes....I've been there and seen em  :)

----- Original Message ----- 
From: "Rob Atkinson" 
To: 
Sent: Wednesday, October 31, 2007 12:57 PM
Subject: Re: [TenTec] SB220-Tubes and QSK


> Hi Chuck,
>
> Yes, you are right--you are of course referring to Ampfet 50 no. 2;
> no. 1 went to CBA in New Brunswick.  Also, when I wrote that no 50 Kw
> AM in the u.s. runs a tube primary I had in mind the 1-A stations but
> later I recalled that 670 in Chicago is still running a Continental
> 317 primary as far as I know, however I maintain that the number of
> tube rigs is rapidly decreasing as the economics make solid state a
> no-brainer.
>
> 73,
>
> Rob / K5UJ
>
>
> <<
> there and still some primaries...Smaller markets just don't get the
Capital
> budgets that larger ones do..Many of the large groups buy the good stuff
for
> the larger markets and send the junk on down the line to the tail
draggers.
> I spent a lot of my broadcast career installing the new and moving the
junk
> down the line for a couple of them... I would be afraid to make the
> statement that NO US  50 KW station runs a tube PA ... you may be right,
but
> I would be a little leary to say it because there are a lot 50KW stations
> out there..By the way I
> installed the 1st 50 KW AM Broadcast transmitter in the US..1985
> ...KBMR --1130  Bismarck, ND..A Nautel. S/N 2
> number 1 was in Canada.....We went through our share of VMOS FET's keeping
> that baby putting out 50KW, but when all  the transistors were good, she
> would do about 65KW!!!     22 years later it still pops some FETs now and
> then, but it's still running except at only 10KW now.....Several years ago
> they brought up another 50KW on 710 and due to a license foul ups they had
> to drop 1130 back to 10 KW or loose it.
>
> 73's
> Chuck
> W6RD>>>
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>
>


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