[Amps] Drake L4B to 6 Meters Help

[Paul Baldock]

Here's the results from my modified SB220

Plate voltage 2500V under load (SSB mode)
Plate current  .75A
Grid  230mA
Drive  75 watts
Output  1100 watts (key down, not pep)

Voltage and current readings are from the SB220 internal metering. 
Power is measured on a Kenwood SW2000A.

If you are still using a T network, then please change to a PI input 
network with the output cap right on the cathode. The Q should be around 4.

- Paul



At 06:54 PM 12/13/2016, Michelle wrote:


>Ok, Here's where I am at:  Removed zener from the self cut off bias 
>mod, Idle current now 200 ma.
>
>Plate voltage 2300 under load (SSB mode)
>Plate current  .810  (was 650)
>Grid  230 (was 220)
>Drive  100 watts
>Output  750 watts (key down, not pep)


http://mysite.verizon.net/paul.baldock/