I have been trying to resolve an intermittent transmit problem with my radio setup. I have a David Clark headsets, JHP-520 and Sigtronics Transcom II. The transmission is received as a very faint sound. Sometimes it works fine, but I haven't been able to figure out what makes it work. I suspect its a bad cord in the Signtronics unit? However, I have done the following:
1) Reconditioned all the headsets from David Clark. They replaced the mics in all of the older ones. Didn't charge me anything since I walked in and they fixed them while I waited. The gel ears are great. I tried different headsets, and still have transmit problems.
2) Replace the antenna VHF-5T NAV/COM ANTENNA. Reception is great now. Still have transmit problems with both antennas.
3) Upgraded to shielded plugs/wires. Reception is great now at high rpm.
4) Upgraded to an iCOM radio, but still too much static to use it. I suspect I need shielded cable installed from the mag switch to mag. I might sell the iCOM. Their is no static on the JHP-520 radio at all. Must be better design. Bought new rechargeable battery pack for JHP-520 too.
5) Changed batteries in the Sigtronics unit. I have model SPO-22, but was considering buying the SPO-22N. Any recommendation?
6) Swapped out the push to talk switch.
7) Cleaned all the plug ends on the cables.
The only other items I haven't changed are the pig tail cables from the radio to the sigtronics cables and the sigtronics unit/cables. I doubt I can find a replacement cable for the JHP-520. I'll try bypassing the Sigtronics unit today to see if this makes a difference.
Its difficult to debug since I have to ask for radio checks all the time. Is there a frequency I can use for this purpose rather than home airport frequency?
Thanks!
Dave
1) Reconditioned all the headsets from David Clark. They replaced the mics in all of the older ones. Didn't charge me anything since I walked in and they fixed them while I waited. The gel ears are great. I tried different headsets, and still have transmit problems.
2) Replace the antenna VHF-5T NAV/COM ANTENNA. Reception is great now. Still have transmit problems with both antennas.
3) Upgraded to shielded plugs/wires. Reception is great now at high rpm.
4) Upgraded to an iCOM radio, but still too much static to use it. I suspect I need shielded cable installed from the mag switch to mag. I might sell the iCOM. Their is no static on the JHP-520 radio at all. Must be better design. Bought new rechargeable battery pack for JHP-520 too.
5) Changed batteries in the Sigtronics unit. I have model SPO-22, but was considering buying the SPO-22N. Any recommendation?
6) Swapped out the push to talk switch.
7) Cleaned all the plug ends on the cables.
The only other items I haven't changed are the pig tail cables from the radio to the sigtronics cables and the sigtronics unit/cables. I doubt I can find a replacement cable for the JHP-520. I'll try bypassing the Sigtronics unit today to see if this makes a difference.
Its difficult to debug since I have to ask for radio checks all the time. Is there a frequency I can use for this purpose rather than home airport frequency?
Thanks!
Dave
