Date: Wed, 28 Apr 2021 09:25:01 -0700
From: Richard Solomon <dickw1ksz@gmail.com>
To: Amplifiers <Amps@contesting.com>
<I have an old AL-811 on the Test Bench
<I use when I need a little more starch for
<test purposes.
<I thought about replacing the 811's with
<572B's.
<Any pitfalls on that idea ?
<Tnx, Dick, W1KSZ
### 572Bs would be the ticket.
Per W8JI, the 811s dont have enough anode diss for modes like
RTTY, FT-8, Data, FM, or AM . The UN modulated CXR on AM has lousy eff,
like 25%.
Do the maths, and the anode diss is TRIPLE the UN-Modulated CXR.
## The issue is the 811s, not the HV supply, cooling etc.
## 572Bs would solve those issues.
Jim VE7RF
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