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best way to check for a bad tube is to disconnect the tube and then start measuring voltages and looking at signals using another oscilloscope

Has anyone explored the possibility of using the K02/K04 switch boxes (either as is or modified) to implement a full two port capability for these analyzer boxes? Custom software would be required, of

<<SNIP>> After reading all of the recent replies to this, I would suspect that a portion of the power supply has failed, and it could cause the one fuse to blow. I would remove the bottom cover and

Hello All Can anyone advice me on a replacement Battery for HP 4195A Please, Struggling to get a replacemenyt in UK and Europe. The Original Battery is Sony Cadnica N-SB2 ( 2.4 v 90mAh ) Lot's of

I have 4 141T units and contacts are a lot of the problem. Clean all contacs on all plugin plugs on the back and in between the two plugins. I use Doixit(Spelling) and this is the best I have ever

The first test is to check all fuses particularly in the back of the plug-ins. Then measure the power supply lines in the frame before you do anything else. I suspect this is not the problem, but you

Hello! Oops! I stand corrected ;-) Regards, JOSE PS: anyway, I think it is not a great deal because it fails regularly... ------------------------------------------------- 73 EB5AGV - JOSE V. GAVILA

When googling the part number (Mfr. code 312001) the manufacturer datasheet mentioned it's a fast fuse. Seems logical, since it's a first protection circuit from the AC line.

Hello! I don't recall... anyway, as they tend to burn without any 'real' problem, I would put an slow one. Regards, JOSE ------------------------------------------------- 73 EB5AGV - JOSE V. GAVILA

The fuse is 250V 1A, but is a slow or fast fuse?

F1 of the IF section is certainly blown! Under the magnifying glass (such a thin fuse) I can see that the fuse is severed. I'll have to go and look for another. Hopefully that's all there is to it

I just noticed that in the manual scan mode the expected 'dot' on the CRT appears but turning the manual scan vernier shows that I can only move the dot from 6th vertical line through to the right of

Suggest that you first check the mating D-type connectors between the RF and IF Sections, these often cause problems especially if you are swopping RF Sections. If no luck with this, download Manuals

Hello Kevin,

I recently purchased a 141T Spectrum Analyzer with the 18GHz and the 1250 MHz plugin. Everything was working fine up until two weeks ago. I just connected the power and tried to fire it up and nothing

Unfortunately I think I'd agree with Jose, I think the tube has been damaged internally and you don't have much hope unless you can find a donor. Dave

Hi Again John, Yes, I think there's a double glass looking from the side, I can see the reflection of the graticule lines on the front glass plate's back. I guess this doesn't change too much, how

Hi John, not at all, separate X and Y drivers, each driving their (separate) deflection plates. Thanks Francesco

Anyone know where I can get a copy of the manual, either paper or pdf ? Thanks, Dick, W1KSZ

Does it have a "Geometry" circuit that takes X and Y as an inputs, multiplies them together, and outputs a signal(s) to the CRT? If not, I think you are out of luck. FWIW, -John