From ON4YVO:
"My sub receiver is not sensitive either. Signals are very weak on strong
signals on the main receiver. Difference is 9 S-points.
That's why I took the effort to measure the resistors. R43 is 51 Ohm, R37 and
R45 are both 63 Ohm. These are on the other side of K10. Of course these
measurements are influenced by the circuit.
These resistors are only in use when the attenuator is switched on. Otherwise
they are bypassed by the relay.
I plan to make some cables so I can measure the board while connected to the
receiver and being fed by a HF generator."
From what you measured above, I can tell you that your R43, R37, and R45
resistors are all good.
Please take a closer look at the schematic. When you measure R43, you are
actually measuring R43 in parallel with R37 and R45 in series. This would be 68
|| (100 + 100) = 50.74 Ohms.
When you measure R37 or R45, you are actually measuring 100 || (68 + 100) =
62.68 Ohms.
I plan to make a few more measurements this weekend and was hoping for some
guidance from the experts. I feel like I have been getting the cold shoulder
here.
I will make a few more measurements here but I have limited resources at home. I
have unlimited resources at work but I am not allowed to work on home equipment.
I have four choices:
1.) Try to fix it myself but I will need to ask a friend if I can use his
surface mount solder station.
2.) Remove it, or do nothing and live with it.
3.) Buy another subreceiver kit for $600.
4.) Send it in for repair.
Good luck,
Dave KG0US
______________________________________________________________
Elecraft mailing list
Home:
http://mailman.qth.net/mailman/listinfo/elecraftHelp:
http://mailman.qth.net/mmfaq.htmPost: mailto:
[hidden email]
This list hosted by:
http://www.qsl.netPlease help support this email list:
http://www.qsl.net/donate.html
Locked
