[ICOM] IC-765 question

Thu Apr 23 16:39:08 EDT 2015

On final tip, Google ESR and print out the chart that gives nominal values of ESR for the different value caps and voltage ratings....
Some meters have this chart printed on the front. Very useful.

ron
N4UE

-----Original Message-----
From: Bert Almemo <balmemo at sympatico.ca>
To: 'ICOM Reflector' <icom at mailman.qth.net>
Sent: Thu, Apr 23, 2015 2:41 pm
Subject: Re: [ICOM] IC-765 question

Hi Randy,

One of my hamradio friends and I have checked out a few ESR meters
and found
this one to be the best at a reasonable price. This meter can be used
in
circuit, i.e. measure ESR without removing the cap. I was
considering
building one but it's not worth the
effort.

http://www.ebay.com/itm/ESR-V5-Capacitor-ESR-Tester-Internal-Resistance-Mete
r-Test-In-Circuit-online-/121423268669?pt=LH_DefaultDomain_0&hash=item1c4564
0b3d

My
friend received his meter a couple of days ago and says it works great.
I'm
also ordering one for myself. This is a great tool that takes away all
the
guess work when trouble shooting caps. Good luck!

73 Bert,
VE3NR

-----Original Message-----
From: Icom
[mailto:icom-bounces at mailman.qth.net] On Behalf Of
rrocket88 at netzero.net
Sent:
Thursday, April 23, 2015 2:21 PM
To: icom at mailman.qth.net
Subject: Re: [ICOM]
IC-765 question

Ron and everyone else , Thank you for this thread, my 765
starts right up /
the 761 kind of slow , 

does anyone have a recommended ESR
tester model they would care to share
info on ??

Thanks to all

Randy
K4IMZ  

---------- Original Message ----------
From: Ron via Icom
<icom at mailman.qth.net>
To: icom at mailman.qth.net
Subject: Re: [ICOM] IC-765
question
Date: Wed, 22 Apr 2015 23:49:19 -0400

Yep, the nice thing about the
ESR testers is that:
- you don't have to remove the component
- the 'value' of
the cap is shown
- the ESR is shown

You will find some old caps will be WAY
out of spec. Electrolytic caps that
are not used on a regular basis, will die
early. That's why the older caps
on the 'shelf' will usually be NFG. Newer 105
C rated caps will last almost
forever, due to sealing / construction.
If you
need any more info, feel free to contact me
directly.
n4ue at arrl.net

73

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 11:30 pm
Subject: Re:
[ICOM] IC-765 question

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 escibiÃ³:
> > > >
> >
> >> 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
> > > >> Users Net: Sundays, 1700Z,
> > 14.316
>
MHz Icom FAQ:
> > >
>> http://www.qsl.net/icom/ To support QSL/QTH.net:
> > >
>>
> >
>
http://www.qsl.net/donate.html
> > > >>
> > > >>
> > > >>  ----
> > >
>
Your Moderator:
> Dick
> > Flanagan K7VC: icom-owner at mailman.qth.net
Icom
> > >
> Users Net: Sundays,
> 1700Z,
> > 14.316 MHz Icom FAQ:
> > >
>
http://www.qsl.net/icom/ To support
> QSL/QTH.net:
> > > >
>
>
http://www.qsl.net/donate.html
> > > >
> > > ----
> > > Your
> Moderator:
Dick
Flanagan K7VC:
> > icom-owner at mailman.qth.net Icom Users
> > > Net:
>
Sundays,
1700Z, 14.316 MHz Icom
> > FAQ: http://www.qsl.net/icom/ To
> > >
support
>
QSL/QTH.net:
> > http://www.qsl.net/donate.html
> > >
> > >
----
> > > Your
Moderator:
> Dick Flanagan K7VC:
> >
icom-owner at mailman.qth.net
> > > Icom Users
Net: Sundays,
> 1700Z, 14.316
MHz
> > > Icom
> > FAQ: http://www.qsl.net/icom/
>
> > To support
>
QSL/QTH.net:
> > http://www.qsl.net/donate.html
> > >
> >
----
> > Your
Moderator: Dick
> Flanagan K7VC:
> > icom-owner at mailman.qth.net
>
> Icom
Users Net: Sundays, 1700Z,
> 14.316 MHz
> > Icom FAQ:
>
>
http://www.qsl.net/icom/
> > To support
QSL/QTH.net:
>
http://www.qsl.net/donate.html
> >
> > ----
> > Your
Moderator: Dick Flanagan
K7VC:
> icom-owner at mailman.qth.net
> > Icom Users
Net: Sundays, 1700Z, 14.316
MHz
> > Icom
> FAQ: http://www.qsl.net/icom/
> >
To support QSL/QTH.net:
>
http://www.qsl.net/donate.html
> ----
> Your
Moderator: Dick Flanagan K7VC:
>
icom-owner at mailman.qth.net
> Icom Users Net:
Sundays, 1700Z, 14.316 MHz Icom
FAQ:
> http://www.qsl.net/icom/
> To support
QSL/QTH.net:
http://www.qsl.net/donate.html
>
> ----
> Your Moderator: Dick
Flanagan K7VC:
icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z,
14.316 MHz Icom
FAQ: http://www.qsl.net/icom/
> To support
QSL/QTH.net:
http://www.qsl.net/donate.html
----
Your Moderator: Dick
Flanagan K7VC:
icom-owner at mailman.qth.net
Icom Users Net: Sundays, 1700Z,
14.316 MHz Icom FAQ:
http://www.qsl.net/icom/
To support QSL/QTH.net:
http://www.qsl.net/donate.html

----
Your Moderator: Dick Flanagan K7VC:
icom-owner at mailman.qth.net Icom Users
Net: Sundays, 1700Z, 14.316 MHz Icom FAQ:
http://www.qsl.net/icom/ To
support QSL/QTH.net:
http://www.qsl.net/donate.html
----
Your Moderator: Dick Flanagan K7VC:
icom-owner at mailman.qth.net Icom Users
Net: Sundays, 1700Z, 14.316 MHz Icom FAQ:
http://www.qsl.net/icom/ To
support QSL/QTH.net:
http://www.qsl.net/donate.html

----
Your Moderator: Dick Flanagan K7VC:
icom-owner at mailman.qth.net
Icom Users Net: Sundays, 1700Z, 14.316 MHz
Icom
FAQ: http://www.qsl.net/icom/
To support QSL/QTH.net:
http://www.qsl.net/donate.html