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Thanks Ed, I will take a look at those control signals and see what we find. Roberto EB4EQA

Hello all, I have an HP 8551 spectrum analyzer I would like to offer for sale or trade. It works reasonably well, as I describe in more detail below, but I am starting to upgrade my home shop with

Where can you buy one of these for $50? Bob

The 3456a was the most accurate in the HP fleet when introduced in 1981. The model line was 345x, so in its heritage was the 3455, 3457, and finally the ersatz standard DMM today, introduced in

If you open the castings of the 70902A, the filter shape of the 3 or 4?narrowest ist lost. Aligning the filters can only be done by the dedicated software. ________________________________ To:

http://aubreyloganterry.com/images/qj35990x.php

Agreed, winter here, humidity < 20% and insane static levels. A 3456A can read multiple volts on open terminals around here. Short the terminals with a short section of small (say 28ga)

Missed this. Pretty heavy but not 100 lbs. I used to work on 620, 616, 614 generators and could manhandle them without too much trouble. These and the 608, 612, etc, were built like steam

On 12/22/2012 12:09 AM, Merchison Burke wrote: > > If I recall correctly, I believe that the sliding portion of the > attenuator can be removed from the fixed portion to effect repairs on > the

Are you aware the very cheap DMMs are often only 1 Meg input resistance instead of the 10 meg in better meters. They can still be very useful as long as you realize they can load a high impedance

That helps. Thank you. Finding the modulation meter would be nice but if I found the RF meter I could shunt it and change the scale. If someone could tell me where to find a negative resistor I

I have an old HP catalog which does not show a year but the picture on the front and back looks like an aerial view of the ocean with many things superimposed. They include a rocket, an Atlas Centaur

If I recall correctly, I believe that the sliding portion of the attenuator can be removed from the fixed portion to effect repairs on the resistors and capacitor but it is ringed with spring fingers

Max, About the meters for the HP 606... I have the manual for the 606B, which lists the meters in the parts list. M1 (Percent Modulation) is a 200uA movement, part number 1120-0075 (the parts list

I have a Boonton 42BD Microwattmeter with a digital display and use it often. Im guessing a mid 70's product?

Really? I thought I've seen Boonton instruments younger than that. Did HP keep the Boonton name for a while after the acquisition? Dave