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Hi Manuel The transistor is a low spec Si PNP, try 2N2955 or even a PNP2N3055. Spec is Si PNP,55V, 5A, FT 3MHZ in a TO3 case. 73 George G6HIG ________________________________________ Sent: 21

Hi, this looks like a power supply problem ;-) I would invest a few hours on searching for the problem. If it is in the power supply, it is likely that you can fix it relatively easy. I would guess a

Changing the board won't help unless the raw supply filter cap for that supply happens to be on it. You likely just need to find and replace the cap and it should be good to go. I believe the cap is

By "Q3", do you mean "HV OSC Q1", the off board power transistor connected to T1-3? The 7.27v base-emitter voltage would indicate either a bad connection to "HV OSC Q1" (open emitter?) or a blown

I opened up my 8566B and found that the +12v on the A17 board to be reading 9.5V with 4.5 of AC ripple. The fuses on this board are ok. No burning ext. Should I just find a used board? Is

I looked up an NTE214 and it’s an NPN.

I found several cross references.? I think NTE214 for instance.? It's a TO-3 PNP 3 MHz t5A 80V unit and there are many that can probably work in that slot.? I may have a few in my junkbox.? You

On my 8566B, I found that I have little or no output from the 100Mhz cal signal as well. I haven't lifted the unit out of the rack yet, but to be clear, I have a blinking PL1 Unlock, PL2 Unlock and

though some people have found old integration caps most likely you have a leaky FET. They are tough to find but the section in the manual that addresses this problem should help.

Hi Manuel The only x ref I have for a 1853-0063 is a SJ 1528 Regards Paul B _____ From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...] Sent: 21

Anyone know of a source or cross reference for a 1853-0063 transistor used in the 410C? I’ve already have a query into Walter at Sphere. Thanks in advance, Manuel

Go to yahoo groups. Sign in. Go to "manage my groups" Select this one. click leave group. This should work for all groups you belong to. Harvey

Greetings, I have had the same issue over the years and found that compressed air works great. It has been my experience that blowing the dust and crud off was more effective than trying to vacuum

I know that when installing a dust collection system for a wood shop, if metal ducting is not to be used, it is important that discharge wires be run inside all the ductwork and grounded to the dust

I'm having trouble unsubscribing.? Twice I've sent an unsubscribe request in, and twice I've confirmed it, but still getting posts.? Any ideas? Bob - AE6RV

Thar does, indeed, look like what we used to use. Thanks. DaveD

Has anyone got an A4 board (DFA) for the Hp3562a? I am looking for a parts machine in the UK too. Thanks Simon

Hi everyone, the last time I asked a question I got some very good advice, so lets see if we have same luck this time. I have the 1740A that I'm trying to restore, its in really good condition

Dave - About a year ago I bought a small vacuum that was specifically intended to clean computers. It will both suck or blow and has lots of attachments. I think it was around $100, but I am no

Hi Bob Well done in getting the olde going. I have just done the same with a 1725a. It was received with no covers bent timebase shafts. Wiring looms cut and no power supply power