[1000mp] No Receiver 7.5 - 14.5 mhz

Tue, 21 Jan 2003 15:04:31 +0200

Very good, Tom.=20

I'm sure there are a lot of MP's out there with the same fault. Credit =
for this fix goes to w6xa who fixed the other radio I mentioned earlier. =
I'm glad I could forward the information to the readers of this =
reflector too.

73 to all,

	Esa OH7WV

-----Original Message-----
From: ext Tom Homewood [mailto:[email protected]]
Sent: 21 January, 2003 02:56
To: [email protected]
Cc: [email protected]
Subject: Re: [1000mp] No Receiver 7.5 - 14.5 mhz

Thanks for all the suggestions. I am happy to report I am now receiving =
on
7.5 - 14.5 mhz, and transmitting on 20 and 30 meteres. When I checked =
the
voltage on TP 4003 in the range from 7.5 - 14.5 I got a constant 13 =
volts
(approximately) versus the 8.2 I was supposed to get at 14.5 and less =
below.
Changing TC 4002 had no effect.

I turned the Local Unit board over and there were two wire leads in the =
area
of TC 4002 that appeared to have marginal solder joints. These were not
surface mount parts but were wire leads coming through the board. I =
touched
these joints up and then measured the voltage on TP 4003 and it was =
close to
where it was supposed to be. I adjusted it a little higher and it is =
working
now. I hope I did a good enough job on the two leads resoldering, I hear =
a
little popping now and then, I may take one more critical look at those
joints.

Thanks to all that helped.

73, Tom, W1TO

----- Original Message -----
From: <[email protected]>
To: <[email protected]>
Sent: Monday, January 20, 2003 2:22 AM
Subject: RE: [1000mp] No Receiver 7.5 - 14.5 mhz

Hi....

This is an easy one. Simply resolder the coil leads on the VCO2 circuit =
and
it will spring back alive. This very same thing happened to a fellow ham =
of
mine just a few months ago. Look for other bad solder joints as well.

73 and GL

Esa OH7WV

-----Original Message-----
From: ext John Tait [mailto:[email protected]]
Sent: 19 January, 2003 19:30
To: [email protected]
Subject: Re: [1000mp] No Receiver 7.5 - 14.5 mhz

Subject: [1000mp] No Receiver 7.5 - 14.5 mhz

Hi Tom..
               This one has come up before..

Sounds like your VCO 2 has stopped.. If you're lucky, it may
just need a " tweak"... If not, then a component has died..
Gimme a yell if I can be of help...
  BTW.. I've come across five other rigs with similar problems in the =
last
month..
                  73
                John EI7BA   http://www.iol.ie/~bravo/

> I have a problem that just started on my MP. I have no received signal
from
> 7.5 to 14.5 mhz on the main receiver. I can receive signals on the =
second
> receiver. I get zero power output if I try to transmit on 20 or 30 =
meters.
> If I try split operation I also get no transmitted signal.
>
> As I tune from just below 7.5 the rx goes from working to not working =
and
as
> I tune from just below 14.5 to above the receiver comes to life. I can
> always hear some background noise but no signal in the 7.5 - 14.5 =
range.
>
> Any one have a suggestion where to look first? I didn't see anything =
quite
> like this in the archives that I reveiwed.
>
> 73, Tom, W1TO
>

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