As in most Grounded Grid Amplifiers the Drake
requires that B- is allowed to float from ground.
If your B- is connected directly to ground
(chassis) the metering system will not work. You
need to check the schematic for the OEM supply and wire accordingly.
- Paul
- KW7Y
At 12:59 AM 2/17/2014, thomas haglund wrote:
Hello
I have a drake l4 hf amp.i have built a external
power supply that i connected to the hv miller
In drake amp.and a still have orginal ps
connected to 220 line to amp to get power to
Amp for 5v to tubes and so on.hv line from orginal ps has been disconnected.
Now a small problem,grid current and anod current meters dont work,what has
I missed?,
Best regads
Thomas
Skickat från min iPad
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