[Amps] Manual tuned inputs

[Dave White]

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 at aol.com
To: Jim.thom at telus.net; amps at 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,  

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