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

The potentionmeter knob might have a tiny little set screw that holds it
onto the shaft.
cuhulin

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

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

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