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I recommend not to pull off the plastic knobs as the service manual says and instead slide off the bezel and the button panel off the pots. The knobs get brittle and break off easily. Otherwise

They are all spoken for. Thx!

I have a 2465B with a broken Volts/VAR shaft and am asking for second opinion on replacing The shaft. My first thought is to pull the front panel out following service manual. Then proceed to the POT

Hey Jason, If you're diagnosing this scope from scratch, then the first port of call is to look at all the supplies at J119 on the main board. There's a table with acceptable voltages and ripple

I'll have to get back to you on that while I check all that out sometime tonight hopefully. I do know that I also see the ripple on channel one, but nowhere near the same amplitude. When I plug a

Gordon, By getting the voltage you say using a meter, you are making a complete circuit from the negative supply, through the crt acting like a diode in this case, to ground. The rest of the circuit

Hi Mark & Morris: Update - I isolated pin 3 of the crt by unsoldering the wire at the junction of R830/C829 & C830 and measured the voltage on the wire. It was around -1070V even though it was not

maybe that's why these parts were kept in an envelope in a scope-mobile drawer with a 7904A on it! The 7A19 must have been nearby at one time too...

Hi John, The 7A29 has no input fuses (thankfully), but the 7A19 does (along with two spares). The 7A19's fuses and attenuator modules share the same form factor. so that they can be inserted into the

Looks similar, except some different circuitry on the flat side. The box it was in was labeled as fuses. Is the fus *IN* the attenuator? Are there five or ten kinds?

I can confirm that the original TM502A fuse drawer fits the replacement power entry module (Schurter p/n 4303.1093)

Jason, I wonder if the caps inside are going bad even though it appears to work. The oscillation could also be decoupling is too low or not at all. If the original electrolytics are still there,

[email protected]> wrote: Interesting. Below 50mV/DIV the preamp amplifies the incoming signal, so it's perhaps within reason that it's amplifying something at the BNC. I guess it might also be

John, those look like 7A19 fuse or attenuator elements. See photos on Tekwiki, or I can take one apart when I get home from work. https://w140.com/tekwiki/wiki/7A19 thanks, Adam

https://www.ecosensory.com/tek/tek-fuses7A29-maybe.jpg

I have a few of NFM's Peak to Peak (067-0625-00 clone) PCBs if anyone would like one for free. I only needed one for myself to play around with. https://youtu.be/VVPHifwseJc?si=BO3K54p_2KfN1lOO msg me

Radu, you are always exceedingly polite! I’m surprised you had difficulty working on a Wavetek generator. I repaired my model 166 function generator about 8 years ago, and I don’t remember it

The smell in the welders was evident on brand new units and replacement PCB's Over time it went away. Other brands from Europe (Kemppi, ESAB, etc), Australia (Cigweld) and USA (Lincoln) didn't have

I have the same experience with some Waveteks - a sweep/signal generator in my case - and working on it has not been fun. Furthermore, I think the design was fundamentally less than stellar (to be

Today, was trying to fix a Wiltron 610D sweep generator with no output. Opening it up revealed the very difficult path to just accessing any of their boards. No slack in connecting wires, no way to