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transformer T402 dedicated volt If all else fails, why don't you just add up the heater currents of all the tubes fed by it? Morris l

My opinion is that a working and calibrated 7S14 that meets all of its original specifications should be worth $150. The problem is that almost nobody has the ability to determine if one is really

Hi Phil, Yes, that is a challenge. First, there were several 6.5 volt filament windings on T402. Here is some of the info you need: pins 17 & 18, 6.5 VAC, 12 A pins 21 & 22, 6.5 VAC, 12 A pins 5 &

Hi Dean Sorry I confused you. I thought I read a message about replacing a number of capacitors in a 475 that was posted by you. Sorry for the confusion. Richard --- dhuster@...

I have one, though I haven't really used it. It seems to work ok, except for a slight "ghost" signal on one trace. Think mine was closer to U$100! If you get a manual too, I will gladly pay a

I used one of these plugins for a couple of years back in the 1980's. It worked just dandy for me (measuring risetimes of pulsed electron guns), under some fairly demanding conditions. I'd happily

Hello! I am in need of some info about the 7S14 plug-in... is it worth $150 in operating condition?. How does it performs? Please, any information will be

Can anyone find the current rating of the 6.3V winding on transformer T402 (#120027) from a type 517 power supply ? T402 may actually be a dedicated 6.3V filament transformer since there were

I'd be careful of using a Radio Shack resistor in that spot. Depending on where it's being used, a 1/8-watt CARBON COMPOSITION resistor might be required as the 1/4-watt (or an 1/8-watt) CARBON

Hello! Well, after some time working with radio gear, now I am back to test equipment... Last time I powered my Tek 475, I found that the chopper circuit no longer worked. CH1 and CH2 work fine

This is simply a 3900 ohm, 1/8 watt, 5% tolerance resistor. I expect a quarter watt unit would do fine. You can find these at Radio Shack. Or I can send you some. I have plenty (I bought out a

I'm not sure I'm on the same page here. What kind of plan? Which caps? Dean

Hi, Andrew, The 317- resistors are standard stock items in many catalogs. I may have one here, though in case you're having a nasty time trying to find one. Regarding the 307- attenuators, are

Hi All, I am looking for the following Tektronix parts: 317-0392-00 RES.,FXD,CMPSN:3.9K OHM,5%,0.125W 307-1020-00 ATTENUATOR,FXD:50 OHM,2X 307-1023-00 ATTENUATOR,FXD:50 OHM,5X 307-1024-00

Hi windsor In case your mail is not working, the fan module arrived today. That is what I call prompt service. My payment should be there soon. Richard

Hello My email is mongteen@... Anyway the motor module is on it's way. Hopefully customs won't hold it up too long. If bits of white foam show out of the corners they might suspect

Hi Dean Thank you. I have been looking over the fan installation. I have a good solder removal tool, plus solder wick. Actually I think I did ok for $225 for the scope. The jitter is minimal,

Windsor, you discovered the fundamental truth we were always taught in Navy "A" school. Always check the power supplies first. And Don, bless his generous Aussie heart, is correct also: you're

Rich, You'll find that the fan motor is a circuit unto itself. The motor itself is brushless and has several Hall-effect sensors inside for input to the drive circuitry. I've replaced motors

Hi All, I am looking for a Vertical Amplifier IC for a Tektronix 2235A Oscilloscope. Tektronix Part Number is 234-0133-20 Can anybody help? Regards, Andrew