Fw: [Amps] Can I run 4-400's in TL922

[Svante Nordenstrom]

----- Original Message -----
From: Svante Nordenstrom <sm3dyu at ji-net.com>
To: RICK COLE <vk3ym at iprimus.com.au>
Sent: Wednesday, June 04, 2003 10:51 AM
Subject: Re: [Amps] Can I run 4-400's in TL922


> Have been running a TL922 with QB4/1100 (RS1002) which is pretty much a
> 4-400 but with graphite anode. No alterations were needed, just replace
BOTH
> tubes, no mixing. The input impedance seems to be very close to the
3-500's
> as no retuning of the input was required.. The TL922 have the unused pins
in
> the socket grounded, which will ground G2 also. Expect some reduction in
> output power, but you should be able to runs some 8-900 watts out with 100
> watts drive.
>
> 73's
> Sam HS0ZDY
>
>
> ----- Original Message -----
> From: RICK COLE <vk3ym at iprimus.com.au>
> To: <Amps at contesting.com>
> Sent: Wednesday, June 04, 2003 12:31 AM
> Subject: [Amps] Can I run 4-400's in TL922
>
>
> > Am I able to use 4-400 tubes in my TL922 amp...I have just been given 10
> of these tubes NIB and was wondering what I had to do to run these in
place
> of the 3-500's if the need arose where I had to change them out...It would
> really save me a lot of dollars to be able to do this..Can somebody advise
> what is involved with modifying or are they just "plug-in and go"..The
> 3-500's are the originals and are well over 20yrs old...nothing wrong with
> them...I am just curious for the future..
> >     Regards  Rick
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>