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Jeff Dutky: I see MC68A02 and MC68B02 for sale on eBay, could you substitute one of those? I did just that and it worked perfectly. Thanks!

Ross, "ways to enable additional Bandwidth for some models"? Would this be for a 2465? How would I find out about this?

See if you have a LO feedthrough signal on band B near the left end of the scale. The A and B band use the same number pencil triode oscillator tube and you can swap the b tube in to get the a band

Hi, Yes, cal data is stored in the nvram. But I wouldn't worry much about it, as the 2432 is very simple to calibrate. By the time you solve the problem of saving and transferring the calibration data

I think Erie made some of them. For those who enjoy restoring boat anchor transmitters such as the Johnson Ranger and Valiant, a temperature compensating version is used in the VFO. They were made

So.eone mentioned Erie,? I am pretty sure that was rhe brand name?Sent from my Galaxy

Unless his posts have gone missing, there should be a record of previous posts on the subject by any number of people.? From what I understand, in the conversion, there are parts left out, so while

I have seen them in stuff as early as early 1930s, never found a bad one, effectively ceramic with silver on either side of the tube. dif temp coefs.....dawgbone Renée

I do not think Chuck is back - message #163375 was years ago. I see him occasionally in the HP/Agilent group. IMHO it was a great loss for this group.

Jeff Dutky wrote on 4/21/2022 8:42 PM: Hello, Jeff-- IIRC,? tubular ceramic capacitors were (or are available as NOS) for many years-- at least into? the late 1930s. The process begins with

The parts I remember seeing in surplus in the late 1950's, so even older, was a hollow ceramic tube, with a wire at each end of the tube, wrapped around the tube for a couple of turns before the part

Fairly common. I have seen them in Collins 51J receivers and in my RCA AR-88 receiver. They are ceramic caps often temperature compensating type. I am drawing a blank on the name of the well known

After latest fixes is above behavior still there? When the switch is in between nothing is connected to horizontal amplifier. If you are seeing a dot in when switch is in between the issue is before

They were commonly available. I've seen them in audio amps and in FM tuners (temperature-compensated). I managed to buy a few about 15 years ago. EJP

I checked one of my 453s that is above 20,000. The TP voltages in the schematic are right. Check the transistors and diodes in that area. The 3,3mfd condenser could be bad. I have had ones with high

I have seen them in HP gear too, and I've mainly seen them referred to as 'dogbone' capacitors when referred to specifically. Unless you specifically want them for an original appearance in a

Were the tubular "dogbone" capacitors unique to Tek, or were they a commonly available third-party component in the 60s and 70s? Does anybody have any information on how these were made? Was there a

UPDATE: I have looked at basically every circuit in the scope at this point. I have suspected that maybe there is an oscillation problem somewhere and even made a "snooping loop" as described in this

I have always had a good experience with Alex. I don't see how anyone could "fake" a 2465 Oscilloscope. The hardware is so unique. Yes, there are ways to enable additional Bandwidth for some models,

Ross, Alex Schonfeld has a bad reputation for selling fake 2465's.? I don't think many people in this group would have anything to do with him.? Just FYI.Jim FordSent from my T-Mobile 4G LTE Device