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Date
Re: 8350B w/83590A repair advice
Hi Mark From the results given it could be that as stated earlier it requires realigning The master yig is multiplied several times to give the full band so during alignment the switching between the
By Paul Bicknell · #101343 ·
Re: 8350B w/83590A repair advice
Thank you for the manual Best Regards Paul
By Paul Bicknell · #101342 ·
Re: Help to repair my HP654A Test Oscillator
Okay Jeremy I appreciate it.? I have two 200CDs and am sure I can glean a matched pair of tubes from the four.? In any case I am interested in taking this far enough to at least approach the amount
By Bob Albert <bob91343@...> · #101341 ·
Re: Have probes - but need matching grounding clips and grabbers
Toby, check the HP Archives for the manuals, search ¡°HP 10017A manual¡±. I also may have the probes and grabbers. I will have to check my stock for extras. Contact me @ donbitters@... with
By Don Bitters · #101340 ·
Re: Help to repair my HP654A Test Oscillator
There are a number of tricks that have been published over the years. I¡¯ll send you copies tomorrow. In the meantime, ? balance the two pairs of tubes that make up the push-pull oscillator. The
By Jeremy Nichols · #101339 ·
Re: Help to repair my HP654A Test Oscillator
What's your secret Jeremy?? I have a couple of 200CDs but they are nothing to write home about regarding distortion. Bob K6DX
By Bob Albert <bob91343@...> · #101338 ·
Re: Help to repair my HP654A Test Oscillator
My650A did fairly well distortion-wise but my favorite is the 200CD. With a few tricks and a little tweaking I was able to get it down to 0.04%, well below spec. Jeremy [email protected]> wrote:
By Jeremy Nichols · #101337 ·
Re: Help to repair my HP654A Test Oscillator
I know this doesn't help but I did want to say that, in all my years of working with HP gear, this circuit is about the worst design.? I have repaired my 651A a couple of times and have never been
By Bob Albert <bob91343@...> · #101336 ·
Re: 8350B w/83590A repair advice
After I clean up and repair the damage to the boards on either side of the pack, I remove the pack "socket" and wires, and throw it all away. There is no significant reason to keep it, as it only
By Chuck Harris · #101335 ·
Re: 8350B w/83590A repair advice
It is the same exact pack as the HP35/45/55/65/67 used. The pack is really, really unnecessary. Its purpose is to prevent you from having to reset the front panel every time you turn on the generator.
By Chuck Harris · #101334 ·
Re: Help to repair my HP654A Test Oscillator
Almost certainly 50Hz AM modulation - 20msec per cycle. Does touching the 645 chassis change the amplitude of the modulation, if so check the chassis ground at the power cord input, you may have an
By Don Bitters · #101333 ·
Re: 8350B w/83590A repair advice
Mark: Hi...Shift 92 and Shift 93 allow the RPG on the plug in to tune through some of the constants in the output tuning. See if you can find a number on the display that solves the output issues. be
By Daniel Nelson · #101332 ·
Re: 8350B w/83590A repair advice
On Sun, 15 Dec 2019, Paul Bicknell wrote: Eh... As I said I have a fully working/refurbished/calibrated 83570A but that is a single-band 18-26.5 GHz plug-in, not a wide range one. As a matter of fact
By Sergey Kubushyn · #101331 ·
Re: 8350B w/83590A repair advice
meant "scan + post" ug
By Mark Bielman · #101330 ·
Re: 8350B w/83590A repair advice
On Sun, 15 Dec 2019, Paul Bicknell wrote: Put it on my web site at: http://www.ksilabs.com/pub/Wiltron-66xxb_Maintenance_Manual.pdf Not of stellar quality but pretty decent, with schematics, drawings,
By Sergey Kubushyn · #101329 ·
Re: 8350B w/83590A repair advice
Hi Paul. I wish the scanned copy of this manual was better. If I get a "real" one, I will sac and post. mark
By Mark Bielman · #101328 ·
Re: 8350B w/83590A repair advice
Hi Mark You have to understand the history behind manuals and the gentleman's agreement we have with HP A lot of the manuals on this HP site have been supplied by members of this group / before Groups
By Paul Bicknell · #101327 ·
Re: 8350B w/83590A repair advice
Hello Serge, Good but somewhat discouraging info. Agree that the mainframe is straight forward and of no concern. But those plug-ins look problematic. I have a service manual for the 83592 (in OK pdf)
By Mark Bielman · #101326 ·
Re: 8350B w/83590A repair advice
Hi looking for a working 26.5 Ghz plug in for a 8350 Regards Paul
By Paul Bicknell · #101325 ·
Re: 8350B w/83590A repair advice
Hi do you have the service manual for the Wiltron 6669B As I have a 6669A Paul
By Paul Bicknell · #101324 ·