Hi Bob
Out of interest what output do you get from the 4-1000 and with what drive/ HT?
What grid and plate current does the tube use at full output?
Cheers
Dave G0OIL
-----Original Message-----
From: K8MLM@aol.com
To: Jim.thom@telus.net; amps@contesting.com
Sent: 09/04/2010 15:15
Subject: Re: [Amps] Manual tuned inputs
I built my 4-1000 amp with a manual input. Pi network used a 4uh variable
inductor and fixed switched input and output caps for each band. Adjusted
the 10m position with the cap right at the base of the tube and for the
lower frequency bands, just switched in more capacitance. It works great..
switch the input band switch and tweak the variable inductor. 1:1 input
SWR every time. Great power output from the 4-1000. Normally need no more
than 85 watts drive.
Bob
K8MLM
In a message dated 4/9/2010 8:59:17 A.M. Eastern Daylight Time,
[truncated by sender]
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