Any brave souls???

Register

Guest Join Us

Hello Guest,

Please feel free to join us!
There are many more parts of the Phorum that only members can see.

Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

Thread Rating:

0 Vote(s) - 0 Average
1
2
3
4
5

Linear Mode

Any brave souls???

Mondial
Phorum Expert

Posts: 1,114
Threads: 14
Joined: Feb 2013
City: Irvington, NY

#8

10-16-2014, 12:04 AM

As far as repairing the HP 8656B, the difficulty will be getting parts since it is no longer supported by Agilent or its new successor. These generators use custom hybrid microcircuits in the output stage, so without the replacement parts repair is next to impossible. I believe this generator uses a PIN diode switched attenuator at the output, which may be where the problem is.

Probably the best solution would be to find a inexpensive parts 8656B on ebay, and use it to interchange modules to localize the problem.

Find

« Next Oldest | Next Newest »

Messages In This Thread

Any brave souls??? - by BrendaAnnD - 10-14-2014, 04:54 AM

RE: Any brave souls??? - by morzh - 10-14-2014, 10:11 AM

RE: Any brave souls??? - by Chuck Schwark - 10-14-2014, 10:22 AM

RE: Any brave souls??? - by BrendaAnnD - 10-15-2014, 09:16 AM

RE: Any brave souls??? - by morzh - 10-15-2014, 09:37 AM

RE: Any brave souls??? - by BrendaAnnD - 10-15-2014, 04:27 PM

RE: Any brave souls??? - by morzh - 10-15-2014, 08:27 PM

RE: Any brave souls??? - by Mondial - 10-16-2014, 12:04 AM

View a Printable Version

Users browsing this thread: 1 Guest(s)

Recent Posts
Graphics for majestic 1050 dial glass.
Murf; I found this thread on the ARF, the first photo has a pretty good view of the dial glass. Regards ArranArran — 01:12 AM
Zenith H725
hello Ed, how about that speacial tape used for ducting it's like foil or how about thin piece of aluminum roof flash...radiorich — 12:19 AM
Zenith H725
Ed; One material that I have seen, but never tried for this was material for making exhaust gaskets, it's similar to ...Arran — 11:42 PM
Zenith H725
I just remembered, I have some hi temp silicone rubber material which could do the trick. Or a piece of FR4 laminate. Th...EdHolland — 08:39 PM
Zenith H725
The PSU filter cap arrived today (thank you USPS!) so I will work on that later. Meanwhile, I have the dial, speaker...EdHolland — 06:42 PM
Philco 610B oscillator wiring
Thanks Terry. After checking my notes I think I recorded about -10v at the 6A7 G4/control grid. The screen grid (G3 &...Tubester — 05:59 PM
The list of my radio & TV collection!
Magical chords of forgotten melodies, old nostalgic music on an old radio... Saturday night blues on the Mid-Waves on an...RadioSvit — 12:20 PM
Philco 42-345 Restoration/Repair
Thank you MrFixr55 the issue with this radio is that the internal coil antenna is missing and there was a wire in its pl...osanders0311 — 11:34 AM
Philco 610B oscillator wiring
Regarding the oscillator circuit which is comprised of the 6A7's cathode, control grid, and screen grid. These elements ...Radioroslyn — 10:33 AM
Philco 42-345 Restoration/Repair
Hi OSanders, First off, welcome to the Philco Phorum where Phine Phamily-Phriendly Pholks Phull of Philco Phacts and P...MrFixr55 — 08:41 AM

Who's Online

There are currently 2403 online users. [Complete List]
» 1 Member(s) | 2402 Guest(s)