I was trying for a G rating.
Pushing the output from 150W to 200W is less than 2dB but can exceed tube ratings (17.5W per tube, so 52.5W per trio)/.6 = 87.5W, continuous. So running 200+W out is likely exceeding the ratings for this tube -- even when allowing for low duty cycle.
I like to keep mine at 150 - 170W. If I need more "oomph", I have amps for that. About 400 mA or so is good.
YMMV,
Steve Wedge, W1ES/4
Time flies like an arrow.? Fruit flies like a banana.
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On Thursday, November 30th, 2023 at 6:49 PM, Joseph K4JNG <jgraif1@...> wrote:
That's very true. Fish have no place in final amplifiers...
joseph n. graif
k4jng
-----Original Message-----
From: [email protected] [email protected] On Behalf Of jerry-KF6VB
Sent: Thursday, November 30, 2023 6:45 PM
To: [email protected]
Cc: Steve Wedge, W1ES/4 via groups.io w1es@...
Subject: Re: [DRAKE-RADIO] TR-4 #ForSale
On 2023-11-30 14:06, Steve Wedge, W1ES/4 via groups.io wrote:
The primary destroyer of the final tubes is driving the carp out of
them all the time.
*** I once built a linear into an ARC-5 transmitter cabinet. It had
4 6LQ6 tubes. I bought them at Radio Shack, which had a lifetime
guarantee
on their tubes. I put that Radio Shack receipt in an envelope and taped it
to the bottom of the linear.
...And I sure did drive the carp out of those tubes :).
- Jerry, KF6VB
