A long drive in a traffic jam could just be the death of it, too, with only water in it. When the water heats up while sitting in traffic it may begin to boil off and overheat. ýThat coolant mix is

All I can say is: Wow! Are things really so tight that you can't rent, or borrow a car for the trip? Rentals are only a problem in the eclipse's path. A head gasket is easy, and is a weekend job.

Hi Harry, I am going to try to set up a service for them, but this summer has gone faster in the fire stomping, and much slower in the transformer winding tasks than I hoped it

I believe all 570 and 575 curve tracers use the old beeswax impregnated transformers. They are the same vintage as the 545 and 545A. The epoxy didn't come onto the scene until the 545B, 547, and

Chuck, I have already pulled the HV transformer from my early version 453, and as I am in no hurry and have other scopes to use, I could go ahead and send it to you whenever you are ready. I thought

Yes it was, and we probably caught the same magical break in the clouds that (just) lasted though totality that you did. We were out on St Agnes Head a only couple of miles down the coast from

I am pleased to report that this scope has now found a buyer in the UK, so it's no longer available. Thank you all for the interest. Regards Chris

Dennis Thanks for this info - at present I am a long way from trying it out on this machine! - so will squirrel it away for later use enjoy the raod trip! Christopher [Non-text portions of this

Craig I have just uploaded 3 pics of the underside EHT section . The transformer seems to be wax impregnated, neither epoxy nor silicon potted. I can scratch wax from the top ( in the pics - in

So there is nothing wrong with the PDA then. As long as the peaks are clamped at the junction of CR1371 and R1373, it is not a problem. How exactly did you measure the 225 volts peak-to-peak? The

That wasn't in Cornwall in 1999, was it? I was one of the /very/ few people in England that actually saw prominences. There were solid stratus clouds everywhere, except for Perranport for 5 mins

That's a coincidence, my wife flew out yesterday (in a 787 it turned out but this one had seats and stuff inside unlike the ones I flew around in when based in Everett!) to see the eclipse and is also

Hi Brent, Thanks for the warning about too much coolant water. If I don't make it I'm not far from the VintageTEK Museum so I can always move in there. They have way more Tek toys than I do. So that

A little too much coolant-(you are using coolant aren't you- water will destroy your water pump) and you will hydraulic that cylinder and bend a rod, or worse. If you're noticing the level drop,

OK, well the visible deflections look just fine and calibrate OK both horizontally and vertically. I've replaced C1371, C1372 and CR1379 (with a BAV21). Can't see that it made any difference. So

I'm headed down to Corvallis Oregon to see the eclipse. I will be leaving Friday night so I am allowing myself plenty of time to travel the 260 miles between home and there. I will be staying with a

The various 4000 series analog switches including the 4051s seem to fail more than other 4000 series CMOS ICs so it might be worth just replacing it or both of them because of the difficulty in

I mean the actual deflection as shown on the CRT. If the PDA (post deflection acceleration) voltage is missing, then the display will be dim and have the wrong (significantly low) horizontal and

The reason for that is that the delay time control will be inaccurate at such fast A sweep speeds because of the latency of the delay time comparator and B sweep circuits. The minimum delay time

Machine Guy, Well I understand why. One thing I should not do then is to cycle it on and off thinking the power on switch is not making proper contact. That is what I was thinking any way. On