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Golly, that goes back! That would be 8410A era in the very late 60's or early 70's. By the early 80's the 8409 systems used the 8350 series sweepers, but I do recall in the 70's having units with the

Hmmm, I don't have the documentation handy. But it sounds like the box used for phase-locking an 8620 series sweeper plug-in to a 3555A generator in the 8409 network analyser systems. I think I still

There is an option 009 Remote Erase Board. This has a relay and switches Pulse Borad (903) A5 to (904) Storage Mesh. Operated from the rear panel. If your unit has this option is the relay contact

Hmmm, I don't have the documentation handy. But it sounds like the box used for phase-locking an 8620 series sweeper plug-in to a 3555A generator in the 8409 network analyser systems. I think I still

Hi Pete having disassembled the block and cleaned mine some time ago I am pretty sure there is no electronics inside it . It is just a interface from wire to the flat transparent ribbon cable. I

Hello, I have written the following email about 3 month ago, no reply and I also couldn't find any information on this thing. There must be some experts out there who know this beast. If not here,

This problem is tough to get a handle on w/o schematics & I have none. But, from your shcematics & parts list, what is the P/N on that "junction" box (I suspect it has some functionality hidden under

thats the way i would do it too and i think the kit is worth $1495 im not familiar with the 8568b but if it dosent have a vga output then it is a fairly complex project to design a product like that.

Suggest compare your junction box continuity with the other unit, might find a part inside like hi voltage diode or resistor etc, I'm not familiar with the devices but seems this step might help pin

I posted this question on the HP list about a week ago and received only one reply, which unfortunately did not fix the problem, so I am trying again, this time with a little more information / test

The screen size was reduced by 2 in vertical.(more compressed in the top) Failure: C608 on the TV video board.(1O?F) By security change also the 1000uF and use good quality 105°c (origin 85°c)

(I should've been clearer on that... it's actually shift-g and shift-h (lowercase). Those are the CLEAR-WRITE and MAX HOLD buttons for the B trace. Or, use the KSg and KSh commands if you're talking

Forget the previous question :-) Thanks Didier KO4BB John Miles wrote:

I can try that, what does it do? Didier KO4BB John Miles wrote:

Letting the tube run constantly at minimum intensity (low/no grid current) does prevent burn-in, but it contributes to cathode poisoning. HP warns against doing that in their manuals, and gives you a

you think that the crt beam is wearing out the phosphor? "ion burns??? i thought aluminized tubes were immune to ion burns? i have found that tek crts last allot longer then hp ones

Don't do that -- make 'em hit shift-G/shift-H! -- john, KE5FX

I agree that the cost of the CRT replacement LCD is fair, considering the work that went into its design. Alternately, consider what it costs to have these instruments repaired for business use. We

I'm thinking of something universal, i.e. a board which can then interface to any reasonably sized TFT LCD with standard flat panel digital inputs. Cheers, Kuba

Hi Exactly that was the base of my comments on the price of te LCD replacement... When I saw it at first, I was almost ready to buy it... and then I asked about the price of it. :(( ~1800U$ plus