SB 104 Help - BoatAnchors Forum at eHam.net

$\'\'$

$\'\'$

$\'\'$

eHam.net Forum : BoatAnchors : SB 104 Help

Forum Help

1-3 of 3 messages

Page 1 of 1

SB 104 Help	Reply
by WG2Y on November 2, 2009	Mail this to a friend!
I am in the process of restoring an SB104. Here is the problem. I keep getting a warble sound on receive. Adjusting the VFO does not eliminate it.I have Scoped the power supply which is the heath supply and all looks good. If I move the power cable the problem moves to a different frequency as shown on the display.I also have the same symptom when I wiggle the coax from the B board to the balanced modulator board. Any ideas????

RE: SB 104 Help	Reply
by WD8LIC on November 10, 2009	Mail this to a friend!
This is a long shot, but the one thing the two things you mentioned have in common is ground. Might try to make sure you've got a good and continuous ground system. It is a long shot, but best I could come up with. Bob

RE: SB 104 Help	Reply
by W9GB on November 14, 2009	Mail this to a friend!
Common Problems Found With The SB-104(A) Transceiver by Ron Baker, WB4HFN http://www.wb4hfn.com/HEATHKIT/Articles/Inside-104/SB104-Transceiver-06.htm Loose Circuit Boards: One very common problem is loose or misaligned circuit boards. This can cause a wide variety of problems from a dead radio, to no receive or transmit, and all sorts of intermittent problems. If you suspect this to be the problem, pull each board completely from the socket and firmly reseat the board by pushing down firmly on the board. Do this to every board in the radio, don't forget to turn off the power before removing the boards. If the contacts are dirty, use a small amount of contact cleaner and degreaser to clean those contacts, just use sparingly and let dry before applying power. Kees, K5BCQ SB-104 Repair Page http://www.qsl.net/k5bcq/sb104/sb104.html === w9gb

Page 1 of 1

Next Topic: National NC-240-D Appraisal
Previous Topic: Drake R4C Receive difficulties

Email Subscription
You are not subscribed to this topic.

Check our help page for help using Forum, or send questions, comments, or suggestions to the Forum Manager.

$\'\'$