[DSP-10] Problems With checkout
Bob Larkin
[email protected]
Fri, 26 Apr 2002 10:40:22 -0700
Hi Jess - Yes, close to 2 Volts is correct. I think the common range is 1.2
to 1.8 or so. I'm sorry about the confusion.
73, Bob W7PUA
(I will make sure this is in the corrections. The first unit was 0.23, but
it was a sport, I think)
At 01:25 PM 4/26/02 EDT, you wrote:
>I am new to the list and I have just put power to my DSP-10. Everything is
>fine except the voltage reading at R110. Instead of .23 volts I get about
>2.0 volts. I have changed Q101 (twice) and U105 (shorted it during testing).
> The voltage at the output of U105 is low also - about 2.5 volts - but when I
>remove L103 the voltage is normal. I have used two different meters and the
>voltage drop across R111 confirms that I do have 20 ma of drain current in
>Q101. I do have 123 Mhz (with the slug of L102 removed) at the output of
>U106 but I have not measured the level yet. Is 2.3 ma really the proper
>amount of current drain for Q101?
>
>Thanks for any help.
>
>Jess - W4MVB
>