Do I see "Goodwill Industries" on the paper in the baggie, and a hand-scribbled sticker on top of the unit? This does not bode well...
mnem
*Toddles off, even dedder now*
Its a signal or a function generator?
Hmm .. Goodwill "Industries" ? C'mon, I thought you're senior TEA member here, its "Instruments" ... aka Good Will "Instruments" ... aka GW Instek.
Not much in audio, its just its so tempting as its so new, and just look at the BNC connector, barely any scratch at all.
I will just leave you guys with the attached photos.
Seriously? The LOL and Wink weren't enough evidence I was yanking your chain? Damn, I wish we had a "tongue-in-cheek" emoji...
Seriously though... awresome score. NIB indeed. What's the label I saw on the top? An inspector signoff?
Houston, we have a trace! The 110V supply is fixed and the scope came up. Checked all the supply voltages and they are OK. But the trace is dull even with full intensity. So I'll have to dive into the CRT circuits and see what's up. I have a suitable HV probe and I respect the HV area especially since I cut my teeth on vacuum tube circuits. Hopefully it will just need some adjustments.
There's life in the old beast after all!
The +55V reference required an adjustment to nominal. The HV was approx 200 volts low. The CRT bias needed just a tweak. Result? Nice, bright trace. More than enough intensity.
Left to do: The vertical attenuator switches are dirty plus it looks like Channel 1 on some settings is stuck on X100 and channel 2 stuck on X10. I need to figure out how to get at the switch decks without pulling the entire board. Then a complete calibration. The time base is off plus the DM44 also needs a calibration.
In the meantime I put it back into the case and I want to give it a good burn-in to see if anything craps out. I do have a pretty good supply of tant caps in case another one decides to commit suicide.
This has been a fun project!
Houston here!
Nicely resurrected! Makes me daydream about diving into my 454 again... but not likely gonna happen any time soon. Same with the 2230. In all reality, neither is likely going to get any attention before I have to move, so I guess I need to find them both a good home.
Anybody interested in a Tek 454 with the ubiquitous intermittent HV fault, or a Tek 2230 with a High-Speed Storage write error (I know there's noise on the 5V rail and I suspect that's the cause as it gets past the low-speed write test with no errors) that does work in analog and acquisition modes once you punch past the error messages, PM me. Both have bright, clear trace.
I'm most interested in them going to a good home, so come on, git you some.
mnem
*Cleaning House*