[ICOM] IC-765 question

Thu Apr 23 15:45:01 EDT 2015

Nu får du komma på Skype snart Göran!

Den 15-04-23 20.41, skrev "Bert Almemo" <balmemo at sympatico.ca>:

> 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
>> 
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>>>>>> 
>>>>>>  ----
>>>>> 
> Your Moderator:
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>>> Flanagan K7VC: icom-owner at mailman.qth.net Icom
>>>> 
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> Flanagan K7VC:
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>>>> Net:
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>>>> Icom Users
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>>> Your Moderator: Dick
>> Flanagan K7VC:
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> K7VC:
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> icom-owner at mailman.qth.net
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