[Elecraft] z5 resonator leads and AGC voltage

Rolf Moberg, OH6KXL rolf.moberg at dnainternet.net
Wed Mar 30 13:34:12 EST 2005


Dan Barker wrote:
> The confusion would come from the warning not to trim the leads of the
> relays. Trim ALL other leads.

I have assembled control, front panel and first stage of rf board.

I didn't trim the IC's leads or resistor pack's leads. I don't know why :-)

What comes to testing, I have the same "problem" with other posters 
lately. If it can be called as a problem. I am not sure.

Mike Markowski wrote:
 > result of a faulty (human!) memory.  I remeasured voltages just now at
 > Control Board locations you measured and got these results:
 >   - U2 pin 5: maxes out at 3.792 V    if you believe that many
 >                                       significant figures.
 >   - U4 OUT:   7.88 V ... the culprit?

and finally Paul Bruneau (SN 4818) wrote:
 > I just ran mine through those tests a few days ago and was slightly
 > troubled to note that mine also maxed out just under the 8v. I think
 > mine got up to 7.98.

My own (SN 4759) measurements with external DMM were as follows:
- U2 pint 5 max 3.79 V
- U4 OUT 7.9 V

I understand there is no big difference between 3.80V and 3.79V. 
However, when manual asks (page 47) to adjust "R1 for a reading of 3.80V 
volts" it seems peculiar not to have enough adjustment scale to achieve 
or exceed the required voltage.

Rolf Moberg
oh6kxl


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