[ICOM] IC-765 question

Wed Apr 22 23:29:53 EDT 2015

Kinda what I expected. Maybe it is time to invest in some new test equip.

Thanks,
Marc
On Apr 22, 2015 8:27 PM, "Ron via Icom" <icom at mailman.qth.net> wrote:

> No, I cannot suggest any specific caps. If you were to purchase an ESR
> meter, you can test the caps 'in circuit' easily. It's a great tool. I have
> several, but if you look on ePay, you can find some great ones, for the $.
> When I refurb a radio (as I am doing with my 'new' Collins 75S-3), I
> double check even the new ones. There is a range of ESR values that the
> different values fall into.
> I do a lot of Lafayette old radios and almost EVERY small value
> electrolytic cap used in the different stages are 'bad'.......
>
> ron
>
>
>
>
>
>
>
> -----Original Message-----
> From: Marc & Tricia Niebergall <mtniebs at gmail.com>
> To: ICOM Reflector <icom at mailman.qth.net>
> Sent: Wed, Apr 22, 2015 11:17 pm
> Subject: Re: [ICOM] IC-765 question
>
>
> Thanks Ron.  I see that there about 12 or so electrolytics in this power
> supply.
> I have changed 3. Without the test equipment are there any you
> would suspect
> over others?
> On Apr 22, 2015 7:49 PM, "Ron via Icom" <icom at mailman.qth.net>
> wrote:
>
> > Hi, I have a large Icom collection and although I don't have a 765, I
> do
> > have a 761. If you do your own repairs as I do, the suggestion of
> acquiring
> > an ESR meter is HIGHLY recommended!
> > I now have several and can
> state that electrolytic caps are the one
> > electronic component that does NOT
> age well!
> > I replace hundreds / year.
> >
> > ron
> > N4UE
> >
> >
> >
> >
> >
> >
> >
> >
> -----Original Message-----
> > From: Marc & Tricia Niebergall
> <mtniebs at gmail.com>
> > To: ICOM Reflector <icom at mailman.qth.net>
> > Sent: Wed, Apr
> 22, 2015 4:34 pm
> > Subject: Re: [ICOM] IC-765 question
> >
> >
> > It's looking like
> it is in the internal power supply.  I disconnected it
> > and
> > jumped a Yaesu
> 13.8 vdc and "instant on".  Tried the internal power
> > supply again
> > and a
> short "pause" before coming alive.  So, now it is just a
> > matter of
> > deciding
> which components are likely the problem.  May start with
> > all the big
> >
> electrolytics.  They are pretty old and probably getting
> > suspect
> > anyway.
> >
> >
> Suggestions?
> >
> > Marc
> >
> > On Wed, Apr 22, 2015 at 1:13 PM, Bert Almemo
> >
> <balmemo at sympatico.ca> wrote:
> >
> > > Most likely the internal PS. The 765 is
> known
> > for PS problems. If you have
> > > an ESR meter, Equivalent Series
> Resistor, you
> > could possibly measure the
> > > elec. Caps without removing them.
> If not, maybe you
> > can borrow from a
> > > friend. It's a great tool to trouble
> shoot elec.caps. Good
> > luck!
> > >
> > > 73 Bert, VE3NR
> > >
> > >
> > >
> > >
> -----Original Message-----
> > > From: Icom
> >
> [mailto:icom-bounces at mailman.qth.net] On Behalf Of Marc &
> > > Tricia
> > >
> >
> Niebergall
> > > Sent: Wednesday, April 22, 2015 2:29 PM
> > > To: ICOM Reflector
> >
> >
> > Subject: Re: [ICOM] IC-765 question
> > >
> > > Will try that, thanks.
> > > On
> Apr 22, 2015
> > 11:26 AM, "GGLL" <nagato at madryndigital.com.ar> wrote:
> > >
> > > >
> You may try to feed
> > the rig with an external power supply to see if it
> > > >
> has the same behaviour.
> > >
> > >
> > > > Regards
> > > > Guillermo - LU5WE.
> > > >
> > >
> > El 22/04/15 a las 15:08, Marc &
> > Tricia Niebergall escibió:
> > > >
> > > >> When
> pushing the AC on switch there is
> > sometimes a pause of a couple
> > > >> seconds
> before the rig powers up.  Other
> > times it comes on almost
> > > >> instantly.
> This usually occurs on the first
> > application of the day.
> > > >> Don't
> > > >>
> know if it is a relay or an electrolytic
> > capacitor taking time to
> > > >>
> charge or what.  I changed two 33uf electrolytics
> > in the power supply
> > > >>
> that were swollen, but no change.  Any suggestions are
> > welcome.
> > > >>
> > > >>
> Thanks,
> > > >> Marc-k7wxk
> > > >> ----
> > > >> Your Moderator: Dick
> > Flanagan
> K7VC: icom-owner at mailman.qth.net Icom
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