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if the heater is shot in the filter you might be able to carefully unsolder the can seam and fix it. maybe deane kidd has replacement filters. that unit probably has a heated yig too the 7l12 dosent

Hi John, - What, specifically, suggests an unlocked first LO? Are you getting specific error messages during self-calibration, or is it just hanging in a loop? <Eric> The offset displayed during all

Happy new year to you all. After quite a number of positive replies to the issue of 492BP chassis heat, I am satisfied that it is fine. John, thanks. I did see the thermal switch today, it is also 103

protection internally "thermostat" Yes, there's a thermal cutout in series with the line. It calls a halt to the festivities at 103 degrees C. -- john, KE5FX

Agreed, the older ones do feel more robust. The problem is really the weight of the SA itself. If the whole thing isn't secured inside its shipping box, then almost any off-center force can pop the

unless the front cover is captive like on a 2336 scope they often become "lost" if one really wanted to make a replacement maybe it could be done with some hardwood plywood and gasketing material. or

Hi John: I would like to take issue with you about the covers for the 49x analyzers. The original cover has two toggle actuated fingers that fit into the front flange of the instrument and hold the

i wonder if the analyzers have some sort of high temp protection internally "thermostat" alot of underhood automotive electronics is designed to run hot. "it does decrease its mtbf i dont care what

Hi, Gerald -- I just tried waving an IR thermometer around the back of my 494AP after about two hours of operation, and the peak temperature I saw was 58C. Ambient temperature was approx. 27C in the

Hi, Eric -- A few thoughts off the top of my head: - What, specifically, suggests an unlocked first LO? Are you getting specific error messages during self-calibration, or is it just hanging in a

Hello, I have a 2754P spectrum analyzer that seems to function well and is stable at all frequencies. However, when I try to run its microprocessor's "Frequency Loops Cal" routine, the 1st LO seems to

you believe the crest factor is so high that a modern true rms multimeter wouldnt do the job? an iron vane voltmeter is true rms responding. a chinese engineer told me the best true tms voltmeter for

Hello Pierre, If I remember right, the big iron potted case contains a device is called a "saturable reactor" (or something like that) and is used to regulate the AC voltage applied to the vertical

The 555 power supply uses that big heavy saturable reactor to regulate the heater voltages. It relies on a little tube that varies its conductivity according to the temperature of its filament and

Andy, Stan's right. I found a 555 on a dump, full of leaves and dirt. I stripped it down, cleaned all the waterproof bits in the bath, dried it with an airline followed by 3 hours at 60C. When I

Anyone have any source available for TM system blank plates, or the eject button only? /Lars -----Ursprungligt meddelande----- Fr?n: TekScopes@... [mailto:TekScopes@...] F?r

Found @ BAMA! ;) 4mbyte djvu file. A beautiful scope btw. -----Ursprungligt meddelande----- Fr?n: TekScopes@... [mailto:TekScopes@...] F?r jeep534 Skickat: den 31 december

Looking for DP501 Parts List & Schematics. Anyone have it in pdf, html, or djvu format? If so, please email to me. If larger than maybe 10MB, encoded, then send to mlcgray@.... I'd really

I have just aquired a 310A scope SN 023989 and I would like to find the manuals for it. it is in unknown condition. I would like to clean it up and use it. Hopefully I can get it to work properly (

You'll see them on eBay every once in awhile, or for that matter, Deane Kidd may be able to put his hands on one. There is an older- and a newer-style (all plastic) cover; either will fit. The