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Now that's a plan! I just won a non-functioning HP 5518A Laser head for 200 bucks because I'd always wanted to play with one and was really looking forward to trying to fix it and find out how they

That was a good price Best Regards CRAIG MAYFIELD | Director - Particle & Environmental Technologies Alpha Scientific Pty Ltd Melbourne Office Phone: (03) 9893 3972 Mobile: 0413 124 589 Email:

I know! I thought about asking a neighbor to come over and break it, and not tell me how. But then I just decided to be happy about getting a 3457A for $75. B-) -Dave

OK, thanks Ozan I appreciate you valuable input Best Regards CRAIG MAYFIELD | Director - Particle & Environmental Technologies Alpha Scientific Pty Ltd Melbourne Office Phone: (03) 9893 3972 Mobile:

--- Hi Craig, I don't have this equipment and I didn't do any repairs on it so can't give you 100% assurance. However, I gave you the link to Keysight?(I am sure you know HP->Agilent->Keysight

Hi Ozan That’s excellent news if that’s the one and its directly compatible. I will get some on order asap if you are sure ? Best Regards CRAIG MAYFIELD | Director - Particle & Environmental

--- Hi Craig, Debugging the actual issue is more fun and I am sure Dave would agree but the transistor can be found by searching Keysight: https://www

Hi Ozan Yes, I did. If I don’t, it comes up with an error 264. By doing the calibration, I am only left with an error 256. I then adjust the flatness pot and can get it to “0” PASS maybe 9

---- Hi Craig, Service manual says "8-49. Front end zero measurement errors (error code 16) and AC flatness test errors (error code 256) can often be remedied by

OK, thanks Radu, that would be great ? Best Regards CRAIG MAYFIELD | Director - Particle & Environmental Technologies Alpha Scientific Pty Ltd Melbourne Office Phone: (03) 9893 3972 Mobile: 0413

Craig, Kidding aside, I'm sure you'll get good help here with your repair. Radu. wrote:

Ahh, OK, thanks Dave Best Regards CRAIG MAYFIELD | Director - Particle & Environmental Technologies Alpha Scientific Pty Ltd Melbourne Office Phone: (03) 9893 3972 Mobile: 0413 124 589 Email:

Dave - terrible!!! How did you cope with that at the time?.... :)

Sure. But while I own a 3457A, I've never had to repair it, so I can't help you with your FET issue. It was frustrating, actually. I bought it on eBay as "broken", wouldn't power on, and got it very

OK, thanks David I assume I can email you back directly, is that correct ? Best Regards CRAIG MAYFIELD | Director - Particle & Environmental Technologies Alpha Scientific Pty Ltd Melbourne Office

It is a mailing list with a (poor) web front end. You'll find it works a whole lot better as a mailing list, rather than trying to use it as a "web forum". Just FYI. -Dave -- Dave McGuire, AK4HZ New

Dear Sir / Madam I have only just joined this group earlier today and am still trying to work out how to navigate my way around I have a HP 3457A and it keeps giving me an error 256. I have replaced

Dear Sir / Madam I have only just joined this group earlier today and am still trying to work out how to navigate my way around I have a HP 3457A and it keeps giving me an error 256. I have replaced

Greetings. An associate suggested that this group may be able to assist me. I have a HP 3457A multimeter and I keep getting error 256. I have followed the steps on a YouTube series where the guy

Hi Ruben, I don’t have a direct answer to your question. But, if you haven’t already seen it, this webpage may be helpful to you: http://www.ke5fx.com/tg8566.html Matt