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#11
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Thank you everybody for all tips. I think its ok now.I found a screw behind
the tuning knob on the front. When I removed the screw, there was no noise anymore. Another question, how can I get loose the potentiometer knob? I think it is glued. //Lars "David" skrev i meddelandet ... The balanced mixer module acts as a microphone. On Mon, 21 Mar 2005 17:59:18 GMT, "Lars Brandt" wrote: No I use a whip antenna and no ground connection. Is it neccesary to connect RX to ground? I have no good ground connection in my flat. So it is normal with noise from the tuning knob if I don't have connetion to ground? //Lars "Dale Parfitt" skrev i meddelandet news:2cs%d.6013$uw6.1020@trnddc06... "Lars Brandt" wrote in message ... Hi Steve I don't think the problem is feedback vibration from the speaker. I have listen even in headphones and then the speaker is quite.It is when I turn the tuning knob I can hear a rassle sound even in the headphones. Are you using an external antenna with a decent RF ground? Not unusual to hear encoder noise when using the atached whip and internal preamp. Grounding the RX will eliminate this. Dale W4OP |
#12
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The potentionmeter knob might have a tiny little set screw that holds it
onto the shaft. cuhulin |
#13
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This was discussed a few months back and I seem to recall that the cap of the
knob was removable; which allowed access to a screw which would loosen the knob. I have encountered other knobs that work this way so that might be the answer. Although I can get a knife edge under the end cap of mine, it does not seem to want to pop off, and I am not inclined to experiment with much force. A search of the archives might confirm the answer. Dave Lars Brandt wrote: Thank you everybody for all tips. I think its ok now.I found a screw behind the tuning knob on the front. When I removed the screw, there was no noise anymore. Another question, how can I get loose the potentiometer knob? I think it is glued. //Lars "David" skrev i meddelandet ... The balanced mixer module acts as a microphone. On Mon, 21 Mar 2005 17:59:18 GMT, "Lars Brandt" wrote: No I use a whip antenna and no ground connection. Is it neccesary to connect RX to ground? I have no good ground connection in my flat. So it is normal with noise from the tuning knob if I don't have connetion to ground? //Lars "Dale Parfitt" skrev i meddelandet news:2cs%d.6013$uw6.1020@trnddc06... "Lars Brandt" wrote in message ... Hi Steve I don't think the problem is feedback vibration from the speaker. I have listen even in headphones and then the speaker is quite.It is when I turn the tuning knob I can hear a rassle sound even in the headphones. Are you using an external antenna with a decent RF ground? Not unusual to hear encoder noise when using the atached whip and internal preamp. Grounding the RX will eliminate this. Dale W4OP |
#14
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If the head of that philips screw is interfering with something,perhaps
file the head of the screw down and hacksaw a slot in the head of the screw so a flat blade screwdriver can be used to tighten the screw back down.I have worked on screws a lot of times before with hacksaws and files.And hammers and chisels and cussin them damn screws and bolts out :{) cuhulin |
#15
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Another question, how can I get loose the potentiometer knob? I think it is glued. //Lars Not near my hf150 now, but I changed out the pot (noisy) a year ago & don't seem to remember any screw on the volume knob. I seem to remember just pulling it off? I may be wrong, but I don't remember EVER having forgotten anything I do remember the cursed design virtually requires disassembly & unsoldering of every part on the board before the volume control could be removed. Not quite but extremely poor placment of the volume pot. Robert |
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