Looking for input on tube testers. If it helps for clarity's sake most of my gear is from the 500 series and its accompanying plugins. If a tube was used in that series (excluding CRTs) I have at leas

Hi all, I have a bunch of scopes I want to adjust/calibrate and I'm looking for something (DIY is fine) to use in place of the usual tunnel diode pulser used with the PG506 as called for in many scope

Hi, dear folks I had to admit, that I was very exciting playing with my old tektronix 475, before it suddenly fail, now no show more trace, nor beam finder. No HV, the TP1318 get 21.6V but no the wave

Hi, I am new to this forum. I saw a lot of helpful activity and expert advice here! I am restoring a tek 475 scope. It has both 15v and -8v power shorted to ground. Likely a bad cap(s) somewhere. The

Hi Gang…. I posted last week that I just acquired my first Oscilloscope last week after 56 years being licensed and working on literally tons of vacuum tube radios without one. The military AN/ USM-4

Hi, I am trying with no success to repair a beautiful 561A in perfect state. When arrived, it worked almost well. After a light and careful cleaning, it does not work any longer. I believe I made no m

More backlogged scope projects to clear out. I'd really prefer local pickup (I'm located in Norwalk, California), but if you want things shipped we can try to work something out. I've never shipped a

Hi all, Mod(s), if this isn't the place to list for-sell items, let me know and I'll put it in the proper place. I couldn't find any solid rules around offering items besides "don't charge ebay prices

I'm currently restoring a TM506 mainframe and have noticed something strange. I've seen this in other mainframes but didn't take much notice until now.. I have a Tek 067-1201-99 mainframe test module

I’ve just acquired supposedly good used SG505 along with TM504. Two separate transactions. Are there any precautionary measures to take before sliding the oscillator into the mainframe? And should I a

I have the following for sale: 5115 Storage Scope 5A18N Dual Trace 5A15N Amplifier 5B12N Dual Time Base 201-1 w/Drawer Model C They have been sitting unused in my garage for the past 18 years. I'm ask

The readout function in my 7704A has been intermittent for years and, when it went out this time, I substituted the 155-0017-00 Time Slot Counter from my 7514 and that caused the readout to start work

I have a P6139A that is missing the collar piece 204-1049-00. Its the only 500MHz probe I have for my TDS520 and I would very much like to use the dang thing. Anyone know where this part can be had wi

I seem to have an attenuation or gain circuit fault but having trouble localizing the problematic area. I have two 7A13 differential comparitors and the issue only appears on one of them which leads m

Hi all, I have a nice 7904 here which has a power supply in pulse mode. Using the troubleshooting procedure points to a fault in the HV section. Some years back I had a 7844 with the same problem and

The price was right (or was it?) so I bought an OF150. It has a bayonet optical connector, so I thought "Aha! An ST!". I was wrong. Although the bayonet works, the fiber (or fibre if you prefer) is to

Hi all, I just recovered a 7A13 late model, S/N 101927 from Guernsey. It's a late model, with LED Vc indicator. Fixed the usual problems with tantaliums and relays. Seems to works very well. Unfortuna

The following photos have been uploaded to the Another Tek 475 with HV failure ( https://groups.io/g/TekScopes/album?id=286843 ) album of the TekScopes@groups.io group. * fat trace.jpg ( https://group

Ettore Pelliccioni <ettore.pelliccioni@...> updated the album Another Tek 475 with HV failure ( https://groups.io/g/TekScopes/album?id=286843 ) : photos to describe issue, about topic https://groups.i

The following photos have been uploaded to the Another Tek 475 with HV failure ( https://groups.io/g/TekScopes/album?id=286843 ) album of the TekScopes@groups.io group. * putting inside.jpeg ( https:/