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MKwrench's latest activity
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I think the main difference is that with wide band transformers (where you don't want resonance), at the higher frequency end of the... -
Philips has some neat application notes http://web.rfoe.net:8000/ZILIAOXIAZAI/PHILIPS/acrobat/applicationnotes/ECO7213.pdf edit: that...
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MKwrench replied to the thread DX350 oscillation issue.I had an old jumper of RG400 that I was able to get 11 windings on a single FT240 ring W1JR style (5-X-5), just for testing (its too...
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The two wires passing between the RF output and its ground return might couple some RF into a sensitive area. I would get the wires out...
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Unplug the mike with the antenna connected and see if you hear weak receiver audio. If so, there is a resistor wired between the sleeve...
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I don’t believe I’m dealing with a microphone problem. The microphones I’ve been using to test with, work perfectly with my old school...
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MKwrench replied to the thread Uniden grant xl echo board removal.Sometimes it's the mic. or related jack board. If it does not unground the RX pin, you'll get a talkback effect. Take a peek let us know...
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MKwrench replied to the thread DX350 oscillation issue.Sounds like a plan, I rewrapped my dual balun with single teflon insulated wire and the measurments weren't that great. I'll grab some...
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The first thing I would try is ditching the bifilar parallel wire winding and run 6+6 turns (maybe even 5+5) of some RG316 or RG400...
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MKwrench replied to the thread DX350 oscillation issue.Popped the amp back open to inspect, AI is telling me that a dirty switch or cracked solder joint near the input transformer can be an...
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MKwrench replied to the thread Texas Star DX 350 HDV Input SWR.Good bump, I was just looking for this exact thread. Mine isn't the HDV version, but I'm sure this will help.
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MKwrench replied to the thread DX350 oscillation issue.Now after swapping jumpers and meters around a few times chasing the issue at the other bands, I discover that the jumper between the...
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MKwrench replied to the thread DX350 oscillation issue.On another note: Something I just read says that my parallel wound choke cuts the common mode resistance in half, I thought it was the...
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MKwrench replied to the thread DX350 oscillation issue.Okay I think We got it, My feed line is two sections of LSR240 (supposedly equivlent to LMR240), One 50' run from my attic feedpoint...
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MKwrench replied to the thread DX350 oscillation issue.I just tried it on another antenna, which is just a magnet mount mobile stuck to my AC unit outside...lol And it works perfectly fine.
