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I am looking for any data, substitute, or availability on these transistors. The 7279 is an NPN and the 7278 is a PNP silicon as best I can tell. They are both TO-220 type cases with an 'EBC' pin

Hi, I'd like to give away the above mentioned service manuals for free. I only ask for refund of the shipping costs from Germany (registered mail for about US$ 8.00 to the US via PayPal). Best

On 12/26/2012 12:53 AM, Patrick Wong wrote: > > Hi Doug, > > I'm not sure how the OP's test would distinguish between > > 1) a situation where the attenuator resistor(s) is/(are) open and he > is

On 12/26/2012 12:01 AM, Max Robinson wrote: > > I don't have any antenna or RF impedance bridge that I trust. So the > 50 ohm > termination and "infinite" impedance test is all I have. > >

On 12/26/2012 12:01 AM, Max Robinson wrote: > > I don't have any antenna or RF impedance bridge that I trust. So the > 50 ohm > termination and "infinite" impedance test is all I have. > >

I don't have any antenna or RF impedance bridge that I trust. So the 50 ohm termination and "infinite" impedance test is all I have. Regards. Max. K 4 O DS. Email:

Ah you were luckier than I. My Marconi TF1066/4 not only had a broken attenuator rack (from removing from cabinet without first turning it inward) but also a burned out 47 Ohm resistor at the

The 3586, 8568, 8566, 8340 series units All used the RPG encoders with a lamp HP 2140-0016 (653 lamp ??). These RPG's were round flattened cylinders. if the lamps were old/darkened by age/misaligned

You may remember that I was concerned about the integrity of the output attenuator in my 608D. Today I checked it again the way I had calibrated it with a short cable and a pass through 50 ohm

I wanted to comment on this but it slipped my so called mind. For the gentleman who was having trouble with a 608 that was drifting and FM-ing I have some suggestions before getting into the RF cage.

I agree with you John, in that Joel is very helpful. This help not only extends to someone owning the latest and greatest VNAs, but people like myself who own obsolete HP kit. His suggest to repair

Am 25.12.2012 um 10:46 schrieb David Kirkby <david.kirkby@...>: I hope you find such a well paid job. In the unlikely event that you need an assistent I would work for you for a small fraction

Dr. Joel is a great, helpful guy. Merry Christmas all, -John ==============

I suspect you are probably right about it being unrepairable except by Agilent. I've not looked, but I doubt schematics are available now, but perhaps they might be when is 20 years out of

Hi Dave: I stand corrected, you can not measure phase angle with a SNA, but you can make a more accurate |S11| measurement with the SNA. An air line is very different from a sliding load. If a

I hear what your saying about the ebay sales of used gear. Got the Fluke 8050a in today that I took a chance on. The seller claimed to have not tested it, yet took the time to photograph it with the

Thanks. I'll keep watching eBay and see what comes along. Regards. Max. K 4 O DS. Email: max@... Transistor site http://www.funwithtransistors.net Vacuum tube site:

Worse. It's likely chock full of custom MMIC's, sole sourced by Agilent. The stuff ceased to be repairable probably more than 20 years ago. -John ==================

And I'm sure the thing is completely unrepairable except by Agilent, schematics are not available, and once it goes out of support that is basically the end of that.

Agreed. Note that the 8754A(?) computer based VNA that went to 18 GHz cost prehaps $80,000 in 1970 (a guess). Probably more w/ options. That's $450,000 in today's deflated dollars, so $700,000 is not