KB1BBY

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  • March 21, 2017 at 5:21 am in reply to: LD-11 Connectors #3457
    KB1BBY
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    I seriously doubt a dynamic mic will work fine with the LD-11 transceiver. I am just another end user, who has acquired a slightly used LD-11 transceiver on eBay auction. I have found that the hand mic supplied with the transceiver is most certainly an electret element mic, which I have replaced with a smaller electret hand mic. I have rewired my spare M-206S hand mic, which was originally supplied with my earlier production Chinese FX-9A transceiver. It is a better size match for the LD-11 transceiver and works quite well. The mic wiring of the 3.5mm mic jack is very simple. The lower shank of your 3.5mm mic plug is common ground. The center section is +PTT and the very tip is +Audio. As for the exact size specifications of the DC power jack, it appears I need to pull out my digital calipers, because getting any real answers on this forum appears to be problematic at best. KB1BBY Scott.

    March 19, 2017 at 8:28 pm in reply to: Smaller hand mic and antenna jack… #3456
    KB1BBY
    Member

    According to preliminary testing with my biggest/best 2KW wattmeter, 1.5KW dummy load and Yaesu FT-950 (used as monitor receiver)…the hand mic rewiring was quite successful. The M-206S hand mic (stock mic supplied with earlier production runs of the Chinese FX-9A transceiver) now works very well with my LD-11 transceiver. Audio range and sensitivity both seem very close to the characteristics of the stock mic included with my LD-11. The M-206S hand mic is more compact, yet still quite comfortable. Also note that the gold plated RIGHT ANGLE 3.5mm stereo plug is a VAST OPERATIONAL IMPROVEMENT over the oversized straight plug on the stock supplied LD-11 hand mic. Still pondering the idea of changing out the BNC antenna jack to the more petite SMA female jack. The SMA type connectors have a much lower profile and are good for at least 20W PEP. I plan to never drive the LD-11 harder than 5W PEP when running barefoot; usually less when driving one of my QRP amplifiers. KB1BBY/Scott

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