Re: [time-nuts] Rpair of an 8662 HP Generator

[KA2WEU--- via time-nuts]

The problem is solved, A German surplus dealer has/had bunch of these  
generator, calibrated and with guarantee for less then $ 3000. And in good  
shape. 
 
Who wants  the old one .. no cost , power supply in trouble , Ulrich 
 
 
In a message dated 4/15/2016 10:01:56 P.M. Eastern Daylight Time,  
time-nuts@febo.com writes:

Thanks,  I do not have a repair manual and I hate to abandon the signal   
generator after man years of positive use... Ulrich  


In a  message dated 4/15/2016 9:14:21 P.M. Eastern Daylight Time,   
paulsw...@gmail.com writes:


Ulrich
To  your first  question I am unaware of anyone that repairs them. Though 
there are   many places that might, typical cal and repair shops. I have a 
sick 
8662  also  (age) and need to dig in. At least I know the board and the 
most  
likely issue.  The yahoo user group has a lot of useful  details.
Regards
Paul
WB8TSL






On Fri, Apr  15, 2016 at 7:08 PM, Dr. Ulrich Rohde via  time-nuts  
<_time-nuts@febo.com_ (mailto:time-nuts@febo.com) >  wrote:

Thanks

Sent  from my iPhone


On Apr 15,  2016, at 6:38 PM, "John Miles" <_john@miles.io_ 
(mailto:j...@miles.io)  >  wrote:

>> My  signal generator has a poor,  intermittent  power  supply.  The RF
>> section is ok.  Who can please  tell me which company can and  will fix  
these
>>  older
>> but excellent   generators?
>>
>>  Thanks, Ulrich
>
> Have  a look at the capacitors in the voltage  divider that drives the  
bases of the switching transistors.  There's a  good chance  that's your 
problem, and they probably need to be replaced even  if  not.  75-TVA1607 
(Mouser 
p/n for Sprague TVA1607) works   well.
>
> It would be nice to use 105C parts if you can find   some, but the 85C 
TVA1607s have worked well for me in multiple 8662As  over  several years.
>
> The other likely suspect is one of  the large  screw-terminal 
electrolytics on the motherboard.  The  power supply can  
almost-but-not-quite start up 
when one of those is  completely open.   High ESR is very likely to cause 
intermittent  operation.
>
> --  john, KE5FX
> Miles Design  LLC
>
>   ___
> time-nuts  mailing  list -- _time-nuts@febo.com_ 
(mailto:time-nuts@febo.com)  
> To  unsubscribe, go to  
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>  and  follow the instructions   there.
___
time-nuts   mailing list -- _time-nuts@febo.com_ 
(mailto:time-nuts@febo.com) 
To  unsubscribe,  go to  
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and   follow the instructions   there.







___
time-nuts  mailing list -- time-nuts@febo.com
To unsubscribe, go to  
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the  instructions there.

___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Rpair of an 8662 HP Generator

[Alexander Pummer]

the service manual is available here: 
http://elektrotanya.com/hp_8662a_sm.pdf/download.html,

special parts are here:  http://www.sphere.bc.ca/test/hpparts.html
possible repair: http://www.naptech.com/

73
KJ6UHN
Alex

On 4/15/2016 6:25 PM, KA2WEU--- via time-nuts wrote:

Thanks, I do not have a repair manual and I hate to abandon the signal
generator after man years of positive use... Ulrich
  
  
In a message dated 4/15/2016 9:14:21 P.M. Eastern Daylight Time,

paulsw...@gmail.com writes:

  
Ulrich

To  your first question I am unaware of anyone that repairs them. Though
there are  many places that might, typical cal and repair shops. I have a sick
8662 also  (age) and need to dig in. At least I know the board and the most
likely issue.  The yahoo user group has a lot of useful details.
Regards
Paul
WB8TSL









___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Rpair of an 8662 HP Generator

[Rob Sherwood .]

With the improvement in the top radios today, it is no longer possible to test 
them with my 8662A / 8663A generators.  I have had to move to 8642A / 8642B. 
However for more general sig gen needs, I prefer the 8662A.

Rob
NC0B

-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of KA2WEU--- via 
time-nuts
Sent: Friday, April 15, 2016 7:26 PM
To: paulsw...@gmail.com; time-nuts@febo.com
Subject: Re: [time-nuts] Rpair of an 8662 HP Generator



Thanks, I do not have a repair manual and I hate to abandon the signal 
generator after man years of positive use... Ulrich  
 
 
In a message dated 4/15/2016 9:14:21 P.M. Eastern Daylight Time,  
paulsw...@gmail.com writes:

 
Ulrich
To  your first question I am unaware of anyone that repairs them. Though 
there are  many places that might, typical cal and repair shops. I have a sick 
8662 also  (age) and need to dig in. At least I know the board and the most 
likely issue.  The yahoo user group has a lot of useful details.
Regards
Paul
WB8TSL






On Fri, Apr 15, 2016 at 7:08 PM, Dr. Ulrich Rohde via  time-nuts 
<_time-nuts@febo.com_ (mailto:time-nuts@febo.com) > wrote:

Thanks

Sent  from my iPhone


On Apr 15, 2016, at 6:38 PM, "John Miles" <_john@miles.io_ 
(mailto:j...@miles.io) >  wrote:

>> My  signal generator has a poor, intermittent  power  supply.  The RF
>> section is ok. Who can please  tell me which company can and  will fix 
these
>>  older
>> but excellent  generators?
>>
>>  Thanks, Ulrich
>
> Have a look at the capacitors in the voltage  divider that drives the 
bases of the switching transistors.  There's a  good chance that's your 
problem, and they probably need to be replaced even  if not.  75-TVA1607 
(Mouser 
p/n for Sprague TVA1607) works  well.
>
> It would be nice to use 105C parts if you can find  some, but the 85C 
TVA1607s have worked well for me in multiple 8662As over  several years.
>
> The other likely suspect is one of the large  screw-terminal 
electrolytics on the motherboard.  The power supply can  almost-but-not-quite 
start up 
when one of those is completely open.   High ESR is very likely to cause 
intermittent operation.
>
> --  john, KE5FX
> Miles Design LLC
>
>  ___
> time-nuts mailing  list -- _time-nuts@febo.com_ 
(mailto:time-nuts@febo.com) 
> To  unsubscribe, go to 
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>  and follow the instructions  there.
___
time-nuts  mailing list -- _time-nuts@febo.com_ (mailto:time-nuts@febo.com) 
To unsubscribe,  go to 
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and  follow the instructions  there.







___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.



--
If this email is spam, report it to
https://support.onlymyemail.com/view/report_spam/ODExMjI6MTg3Mjk2ODEzMzpyb2JAbmMwYi5jb206ZGVsaXZlcmVk

___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Rpair of an 8662 HP Generator

[Rob Sherwood .]

If you 8662A has gone "bang" yet, replace the electrolytic on the three boards 
is a good starting place.  Once it goes bang you will have a to start replacing 
solid-state devices.  

Rob, NC0B

-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of KA2WEU--- via 
time-nuts
Sent: Friday, April 15, 2016 1:04 PM
To: time-nuts@febo.com
Subject: [time-nuts] Rpair of an 8662 HP Generator



My  signal generator has a poor, intermittent power  supply.  The RF section is 
ok. Who can please tell me which company can and  will fix these older but 
excellent  generators?
 
Thanks, Ulrich 
 
 
___
time-nuts mailing  list -- time-nuts@febo.com To unsubscribe, go to 
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the  instructions there.

___
time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to 
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.



--
If this email is spam, report it to
https://support.onlymyemail.com/view/report_spam/ODExMjI6MTg3Mjk0MDA3NTpyb2JAbmMwYi5jb206ZGVsaXZlcmVk

___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Rpair of an 8662 HP Generator

[KA2WEU--- via time-nuts]

Thanks
 
 
In a message dated 4/15/2016 10:02:01 P.M. Eastern Daylight Time,  
scmcgr...@gmail.com writes:

Silicon  investigations repairs them. Google the name for website

Content by  Scott
Typos by Siri

On Apr 15, 2016, at 6:38 PM, John Miles   wrote:

>> My  signal generator has a  poor, intermittent power  supply.  The RF
>> section is ok.  Who can please tell me which company can and  will fix 
these
>>  older
>> but excellent  generators?
>> 
>>  Thanks, Ulrich
> 
> Have a look at the capacitors in the voltage  divider that drives the 
bases of the switching transistors.  There's a  good chance that's your 
problem, and they probably need to be replaced even if  not.  75-TVA1607 
(Mouser 
p/n for Sprague TVA1607) works well.   
> 
> It would be nice to use 105C parts if you can find some, but  the 85C 
TVA1607s have worked well for me in multiple 8662As over several  years. 
> 
> The other likely suspect is one of the large  screw-terminal 
electrolytics on the motherboard.  The power supply can  almost-but-not-quite 
start up 
when one of those is completely open.  High  ESR is very likely to cause 
intermittent operation. 
> 
> -- john,  KE5FX
> Miles Design LLC
> 
>  ___
> time-nuts mailing list  -- time-nuts@febo.com
> To unsubscribe, go to  
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the  instructions  there.
___
time-nuts mailing  list -- time-nuts@febo.com
To unsubscribe, go to  
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the  instructions there.

___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Rpair of an 8662 HP Generator

[Scott McGrath]

Silicon investigations repairs them. Google the name for website

Content by Scott
Typos by Siri

On Apr 15, 2016, at 6:38 PM, John Miles  wrote:

>> My  signal generator has a poor, intermittent power  supply.  The RF
>> section is ok. Who can please tell me which company can and  will fix these
>> older
>> but excellent  generators?
>> 
>> Thanks, Ulrich
> 
> Have a look at the capacitors in the voltage divider that drives the bases of 
> the switching transistors.  There's a good chance that's your problem, and 
> they probably need to be replaced even if not.  75-TVA1607 (Mouser p/n for 
> Sprague TVA1607) works well.  
> 
> It would be nice to use 105C parts if you can find some, but the 85C TVA1607s 
> have worked well for me in multiple 8662As over several years. 
> 
> The other likely suspect is one of the large screw-terminal electrolytics on 
> the motherboard.  The power supply can almost-but-not-quite start up when one 
> of those is completely open.  High ESR is very likely to cause intermittent 
> operation. 
> 
> -- john, KE5FX
> Miles Design LLC
> 
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Rpair of an 8662 HP Generator

[KA2WEU--- via time-nuts]

Thanks, I do not have a repair manual and I hate to abandon the signal  
generator after man years of positive use... Ulrich  
 
 
In a message dated 4/15/2016 9:14:21 P.M. Eastern Daylight Time,  
paulsw...@gmail.com writes:

 
Ulrich
To  your first question I am unaware of anyone that repairs them. Though 
there are  many places that might, typical cal and repair shops. I have a sick 
8662 also  (age) and need to dig in. At least I know the board and the most 
likely issue.  The yahoo user group has a lot of useful details.
Regards
Paul
WB8TSL






On Fri, Apr 15, 2016 at 7:08 PM, Dr. Ulrich Rohde via  time-nuts 
<_time-nuts@febo.com_ (mailto:time-nuts@febo.com) > wrote:

Thanks

Sent  from my iPhone


On Apr 15, 2016, at 6:38 PM, "John Miles" <_john@miles.io_ 
(mailto:j...@miles.io) >  wrote:

>> My  signal generator has a poor, intermittent  power  supply.  The RF
>> section is ok. Who can please  tell me which company can and  will fix 
these
>>  older
>> but excellent  generators?
>>
>>  Thanks, Ulrich
>
> Have a look at the capacitors in the voltage  divider that drives the 
bases of the switching transistors.  There's a  good chance that's your 
problem, and they probably need to be replaced even  if not.  75-TVA1607 
(Mouser 
p/n for Sprague TVA1607) works  well.
>
> It would be nice to use 105C parts if you can find  some, but the 85C 
TVA1607s have worked well for me in multiple 8662As over  several years.
>
> The other likely suspect is one of the large  screw-terminal 
electrolytics on the motherboard.  The power supply can  almost-but-not-quite 
start up 
when one of those is completely open.   High ESR is very likely to cause 
intermittent operation.
>
> --  john, KE5FX
> Miles Design LLC
>
>  ___
> time-nuts mailing  list -- _time-nuts@febo.com_ 
(mailto:time-nuts@febo.com) 
> To  unsubscribe, go to 
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>  and follow the instructions  there.
___
time-nuts  mailing list -- _time-nuts@febo.com_ (mailto:time-nuts@febo.com) 
To unsubscribe,  go to 
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and  follow the instructions  there.







___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Rpair of an 8662 HP Generator

[paul swed]

Ulrich
To your first question I am unaware of anyone that repairs them. Though
there are many places that might, typical cal and repair shops. I have a
sick 8662 also (age) and need to dig in. At least I know the board and the
most likely issue. The yahoo user group has a lot of useful details.
Regards
Paul
WB8TSL



On Fri, Apr 15, 2016 at 7:08 PM, Dr. Ulrich Rohde via time-nuts <
time-nuts@febo.com> wrote:

> Thanks
>
> Sent from my iPhone
>
> On Apr 15, 2016, at 6:38 PM, "John Miles"  wrote:
>
> >> My  signal generator has a poor, intermittent power  supply.  The RF
> >> section is ok. Who can please tell me which company can and  will fix
> these
> >> older
> >> but excellent  generators?
> >>
> >> Thanks, Ulrich
> >
> > Have a look at the capacitors in the voltage divider that drives the
> bases of the switching transistors.  There's a good chance that's your
> problem, and they probably need to be replaced even if not.  75-TVA1607
> (Mouser p/n for Sprague TVA1607) works well.
> >
> > It would be nice to use 105C parts if you can find some, but the 85C
> TVA1607s have worked well for me in multiple 8662As over several years.
> >
> > The other likely suspect is one of the large screw-terminal
> electrolytics on the motherboard.  The power supply can
> almost-but-not-quite start up when one of those is completely open.  High
> ESR is very likely to cause intermittent operation.
> >
> > -- john, KE5FX
> > Miles Design LLC
> >
> > ___
> > time-nuts mailing list -- time-nuts@febo.com
> > To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> > and follow the instructions there.
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Rpair of an 8662 HP Generator

[Dr. Ulrich Rohde via time-nuts]

Thanks 

Sent from my iPhone

On Apr 15, 2016, at 6:38 PM, "John Miles"  wrote:

>> My  signal generator has a poor, intermittent power  supply.  The RF
>> section is ok. Who can please tell me which company can and  will fix these
>> older
>> but excellent  generators?
>> 
>> Thanks, Ulrich
> 
> Have a look at the capacitors in the voltage divider that drives the bases of 
> the switching transistors.  There's a good chance that's your problem, and 
> they probably need to be replaced even if not.  75-TVA1607 (Mouser p/n for 
> Sprague TVA1607) works well.  
> 
> It would be nice to use 105C parts if you can find some, but the 85C TVA1607s 
> have worked well for me in multiple 8662As over several years. 
> 
> The other likely suspect is one of the large screw-terminal electrolytics on 
> the motherboard.  The power supply can almost-but-not-quite start up when one 
> of those is completely open.  High ESR is very likely to cause intermittent 
> operation. 
> 
> -- john, KE5FX
> Miles Design LLC
> 
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Rpair of an 8662 HP Generator

[Dan Rae]

On 4/15/2016 3:38 PM, John Miles wrote:
Have a look at the capacitors in the voltage divider that drives the 
bases of the switching transistors. There's a good chance that's your 
problem, and they probably need to be replaced even if not. 75-TVA1607 
(Mouser p/n for Sprague TVA1607) works well.
John for what it's worth both my 8662 and 8663 which are late (1994) 
revisions have these single 15 µF caps replaced by two parallel 10 µFs 
among other changes in the power supply area.   Maybe worth doing if 
they can be fitted...


Dan
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Rpair of an 8662 HP Generator

[John Miles]

> My  signal generator has a poor, intermittent power  supply.  The RF
> section is ok. Who can please tell me which company can and  will fix these
> older
> but excellent  generators?
> 
> Thanks, Ulrich

Have a look at the capacitors in the voltage divider that drives the bases of 
the switching transistors.  There's a good chance that's your problem, and they 
probably need to be replaced even if not.  75-TVA1607 (Mouser p/n for Sprague 
TVA1607) works well.  

It would be nice to use 105C parts if you can find some, but the 85C TVA1607s 
have worked well for me in multiple 8662As over several years. 

The other likely suspect is one of the large screw-terminal electrolytics on 
the motherboard.  The power supply can almost-but-not-quite start up when one 
of those is completely open.  High ESR is very likely to cause intermittent 
operation. 

-- john, KE5FX
Miles Design LLC

___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

[time-nuts] Rpair of an 8662 HP Generator

[KA2WEU--- via time-nuts]

My  signal generator has a poor, intermittent power  supply.  The RF 
section is ok. Who can please tell me which company can and  will fix these 
older 
but excellent  generators?
 
Thanks, Ulrich 
 
 
___
time-nuts mailing  list -- time-nuts@febo.com
To unsubscribe, go to  
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the  instructions there.

___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.