My restoration project continues... My project 540 has great receive audio, but very distorted transmit audio, as if it was being overdriven. Power out into a dummy loadlooks good, but on another rec
Sounds like nothing more than the mic gain turned up way too high. I don't know the 540, but the manual should tell you where the mic gain is. 73, Jim K9YC ___________________________________________
Bill, The 540 has an interesting feature. You can unplug the coax coming from the driver and plug it directly into the Low Pass Filter. (Of course 'after' unplugging the coax from the finals from the
Hmmm, I guess the instructions below weren't very clear. The TX driver board's output is over a piece of RG-174 coax with an RCA Phono plug on the end. It plugs into the input of the final amp (PA) b
I have a Delta and Omni-A, so I am setting the ALC/Drive correctly. I'll try taking the finals out of the equation. I also note there are bias settings on both the finals and the OT-TR assembly that
FWIW, here is a link to the Ten Tec Wiki entry for the Model 215 microphone, originally sold for use with the 540 (and others). You may wish to compare the specs with the mike you are using to see if
*Have you tried making a serious RF Gain reduction to the receiver you are monitoring with? What about On the Air Reports? I had a similar problem many years back. My receiver being used to monitor w
Good point, Wade. I put a dummy load on both the 540 and the other RX. I also tried to work a station on 20m last night, and they said "I hear someone calling, but you are very distorted".I swapped
Update Due to having a second rig (a Triton IV), as well as some extra boards I have picked up over the years, I was able to swap out all of the critical boards in the rig, including the PA module, w
Author: K4KJC Mike Ballenger via TenTec <tentec@contesting.com>
Date: Wed, 8 Apr 2015 00:03:38 -0400
Just a wild, uneducated guess.....but could a dirty or partly out-of-position antenna switch on back panel have any effect on transmit audio. I learned from experience years ago that the little auxil
Resolved. After finally doing some real voltage checks per the manual rather than just the board swaps, I found the +8 (REG) line at 13.8V. I ordered and replaced the MC1723CL on the source logic boa
Way to go, Bill. I told you that you would find the problem! Well done! 73 - Rick, DJ0IP (Nr. Frankfurt am Main) Resolved. After finally doing some real voltage checks per the manual rather than just