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Hello, on the risk of sounding like a broken record: please hang onto the DANAHER 576, 577 and 575 instruments with damaged screens. Tamoggemon Holding k.s. currently is not in a position to make a

One more thing - it's possible that the intensity and focus pot string resistors have drifted way out of spec. Depending on the circuit and drift direction, you may not have enough range for intensity

You may want to check that "intensify pulse" thing and circuitry to be sure it's working right. I don't recall if it should be active except in pulse mode. Speaking of which, are you sure you have the

Hello, I have a 154-0563-05 CRT which came from the estate of a Tek collector.? I don't have a 576 so it's of no use to me.? You can have it for the cost of shipping from 97229 and take the gamble

Thanks for the tips, and I will try the storage calibration when I get a moment. Incidentally, I also have some analog storage Tek scopes — a 549, a 7623, and a 564. The 549 is in excellent

wrote: On my new-to-me 577 the storage brightness knob only works when the collector supply is turned down as near zero as makes no difference.

Hi Dave, I have probably used at least fifty Tek scopes in my lifetime but fewer than five storage scopes or curve tracers. The first time I tried using storage was on an almost new 549 in 1968. I

Dennis, no other instrument used the 154-0563-xx CRT, unfortunately.

You can set the mains input selector to the LOW position. This will increase the CRT filament voltage somewhat, and will increase the brightness at least a little. It also increases the LV regulator

Hi Eric, The 576 is a very valuable curve tracer. I may be possible to locate a replacement CRT from another instrument. It uses a 154-0563-00 in serial numbers below B060000 and a 154-0563-01 in

It is a used CRT that the previous owner was told was extracted from a working unit, though “working” may or may not have included storage. The previous owner of my 577 didn’t know. And

Got a 576 that was supposed to be in working order but it seems it is not even close. After rebuilding the collector supply, I managed to get sweep again on the tube but the tube is VERY dim. I have a

Hi Dave, Was the replacement CRT a new CRT? If not new how do you know it was any good in the first place? Dennis Tillman W7PF <SNIP>

Dave, Yes, I believe that this is exactly what you are experiencing. According to the Service manual, replacing the CRT will require the Storage circuit to be adjusted to match the characteristics

I have a 577 D1 that came with the original but weak CRT installed and a replacement CRT in a box. Storage mode on the original weak CRT worked well, but the primary trace was almost too dim to see.

Hi DW, I have a 577 D1 which has similar behavior but not as bad as you described. There is an adjustment procedure in the service manual that will, in theory, bring the storage back into proper

I would certainly check that the store/non store switch is actually latching and unlatching properly. This may seem obvious, however, I have seen many of these type of switches that were gummed up

This 577 is a D1 version, the ability to temporary hold display information in a analog format which is actually quite neat. This feature appears to be fully function when I want to use it, the

Max peak volts 6.5 Series resistors 0.12 Horzi V Division 50mV Vert I Division 0.2mA Collector voltage 0V 100 ohm Resistor across Collector Emitter With collector set to AC and switch set to neutral

Matti, The only battery I know of in the TDS-5104 is the cmos back on the PC mother board. If you don't have the maintenance manuals from the TEK website get them. There's 1 screw on the top cover