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On Wed, 10/4/17, 'Tom Miller' tmiller11147@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:

Subject: Re: [hp_agilent_equipment] RE: Some HP 8341A questions
To: hp_agilent_equipment@...
Date: Wednesday, October 4, 2017, 6:06 PM


?












It is possible to run
the YIG by itself. Do you
have a spectrum analyzer to look at the output?
?
You will need several power
supplies. Probably two
to power the oscillator and a constant current supply to
power the
coil.
?
If you can take a few good
pictures of the board,
we may be able to make a few more suggestions.
?
Do you have a schematic for
the 8341A?
?
?
Regards
?
?

----- Original Message -----

From:
Tobias Pluess
tobias.pluess@... [hp_agilent_equipment]
To: hp_agilent_equipment@...


Sent: Wednesday,
October 04, 2017 11:03
AM
Subject:
[hp_agilent_equipment] RE: Some
HP 8341A questions

?


Hi

all,
in case anyone can help:
today I opened my 8341A and I found out
that the YIG used is a HP 5086-7323, just in case anyone
has a replacement ;-)
Is it possible to test that YIG somehow outside the
instrument?
I know that
the A55 board, the YO driver, HP PN 08340-60202, is also
faulty. So, with a
bit of luck, the YIG may still be ok and if I exchange A55
everything is fine.
However, if possible, I would like to verify whether the
YIG
oscillates.
Does this make sense?

Tobias






From:
hp_agilent_equipment@...
[hp_agilent_equipment@...]
Sent: Tuesday, October 03,
2017 16:50
To:
hp_agilent_equipment@...
Subject: [hp_agilent_equipment]
Some HP 8341A questions



?




Hi,
I
got a HP 8341A for free! however, there is a little
problem:
The A55 board
is faulty (YO driver), as well as the YTO. The rest of the
device should be
fine. The YO and A55 are faulty because the unit was used
for parts to repair
another unit.
I wonder what the chances
are to repair the 8341A. I know
only these two assemblies should be faulty; I guess, a YO
could be found on
ebay (no luck today, though) but I don't know whether
it is possible to fix
A55.
I found a service manual here



but
no schematics there. Has anyone some experience with the
8341A?

And
some other question: My unit has the RF output on the rear
panel; I wonder
whether it is possible with affordable effort to install
the RF output on the
front panel?

Thanks for
any hints,
best
Tobias,
HB9FSX















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