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Silly question: Did you remember to unplug all input sources before starting SPC? Raymond

The machine has plenty of clearance. I have tried running the SPC soon as I power it on and after it has been running for about 30-40 minutes. It keeps failing for the same code (** 1B failed -- no

Hi Paul, Before you start the SPC Procedure the scope tells you the Purpose of this Procedure. That it failed after 5 minutes is a good sign. Maybe the internal temperature rises too much during this

Yes I ran an SPC, it runs for about 5 minutes then fails. I was able to get the faults from the console, it points to something about the trigger. Here is the fault: SHOWTIME: SPC starting step : Trig

DId you run the SPC? Can be (it is?) a damaged acquisition board. (Was one of the channels over-volted? or cable static discharge damage?) There is... at least... a resistor, a relay, a pre-amp in the

I decided to keep the 7633. Prefer analog over DSOs for doing most analog work.

Hello, I purchased a DPO7254 that is failing SPC. The channels seem to all work in all modes. Both 1mOhm and 50Ohm and all voltage ranges on all channels seem to be working properly but SPC keeps

7633 CRO frame with service manual (no plugins, but might be available depending on demand). Hasn't be used for a long time, so would be advisable to do the 240V variac treatment (i ramp it up 20V per

7633 CRO frame with service manual (no plugins, but might be available depending on demand). Hasn't be used for a long time, so would be advisable to do the 240V variac treatment (i ramp it up 20V per

... Hello George.L, I am arranging to sell the gear as complete systems to two other enthusiast buyers. These decisions are hard to make for much worthy interest. Thankyou very much for your interest

Hi Russell, Forgot to mention that i am happy to buy items from? you (or send money to your favorite charity)...eg Have been after a HP8444a tracking generator for the Hp141 for years, to go with the

Hi Russell, I am interested in MOST? of this equipment particularly a tracking generator for my HP141T (and? a RF, Audio, plugin) I am located in Sydney but i think i can get a courier to pick up

Hi, I've have a Tek 7104 with a 500MHz timebase plugin (7A29 ? it's around here somewhere) and a 7904. The 7104 looks new and i have a thick service manual for it. The 7904 is older looking and also

The KO4BB website is not mine.? I just participated in a WIKI he operated in the past.? Apparently the TR502/TR503 conversion account (from about 15-years ago) was later saved to his website.? I

Thanks Bruce, I will use the 494 to align the TR502 as you suggested (just wanted to make sure it could be done) I gather the Ko4bb site is yours ? Essential site for all Test Gear minded?

Can't you just use the 494 to align the tracking generator?? I used a 492. Bruce, KG6OJI

Hi. In this day and age... Take the 52.5MHz oscillator, divide by 21 to get 2.5MHz, then with a PLL lock a 55MHz VCO to that, via a divide by 22 counter. It depends what you want, especially if you

Just replacing the crystal with a programmable oscillator might not work.? A varactor tweaks the crystal oscillator frequency for tracking adjustment.? There are programmable oscillators like the

There is also in Belgium: https://www.klove.nl/crystals/ Sam Reaves ARS W3OHM [email protected]> wrote:

I have heard that Bomar Crystals is back in business making crystals for ham use: http://bomarcrystal.com/ Sam Reaves ARS W3OHM [email protected]> wrote: