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The KE- number should refer back to a drawing. It won't be useful. The 670-4177 (followed by 2 digits of version number) is the populated board. -ls- John Byers <face1941@...> wrote:

John Then the board number is likely 670-4177-xx as Albert surmised earlier But sounds like we are now all looking at the same board overlay regardless Cheers Dave

To Dave and Lyn who asked me what the circuit board details were The only part number I see on my board is KE-4598-00 INTERFACE 670-417-7 The board drawing is marked "Interface Circuit Board

G'.day Albert Ive confused you by saying "there are only 2 IC's except for the 20 pin control chip", Better I had said "apart from the Tek special 20 pin control chip there are only two standard type

David, my previous posting was a friendly hint for another fellow Tek enthusiastic, who might be interested in the item. Doing so has a long tradition within this group... Ciao, Magnus

Jim, The current problem with this guy is something is drawing so much power it causes Q1380 on the main board to blow. Q1381 is okay. When Q1380 goes, it also takes F3488 with it.

<fakecrap@...> wrote: In high ripple current applications, sometimes higher voltage capacitors than strictly necessary are used because the larger physical size can dissipate more heat so they

<fakecrap@...> wrote: The -15V output uses the +50V output as a reference. The +50V output also powers the error amplifier for the +15V output which powers the error amplifier for the -15V

Great info, thanks. I was under the impression that I should replace with like-sized capacitance and at least similar voltage (higher being OK as well). I assume the capacitance is OK to increase

Everything depends on the +50 supply. Even the regulator op amps get their supply from the +50. So yes, you need to get the 50 volts working first. I would find a radial lead cap (wire leads) that is

Sorry, you are right, Stan's book says 670 is with parts indeed. Albert

I did some more reading, and then more testing, over the past week. I also purchased an ESR meter to aid my testing. What I found was that two of the main caps are definitely bad (one had too high of

You may want to recheck all of the controls - especially buttons - to make sure you didn't inadvertantly change any while pushing the plug-in into the compartment. There's not much free space on the

A truly bare board is a 388-xxxx-yy. ISTR a 670 is a populated board, and a 672 is a populated board with any necessary hand adds. If not that, it's something close. -ls- Artekmedia

what's up mark? I have an sc504 that i had problem with. mine turned out to be the hv multiplier. jim

OK that some sense , although I doubt it is a "bare" board, I suspect the parts in the kit are external to the board, and that the board is otherwise fully assembled Dave

And? Didn't think so, since it's being sold by Tektronix surplus!

Hi Jerry, I've send the $12 to your paypal account. Many thanks Gerhard

Hi Gerhard, Shipping for 6 ounces is 6.90usd. Send 12usd to j_massengale@... via paypal and it will be on it's way. Jerry Massengale

Hi Dave, It seems that 672-0538-00 is a set containing not only the circuit board but also several other components: http://www.ctg123.com/rapid-quote-system/request/?p=672-0538-00 In other words,