Wtb(us): keithley rack ears, fluke 3330b rack ears, hp rack ears/handles

[super7800]

Does anyone have fluke 3330b (current voltage calibrator) rack ears? Also looking for 2u and 3u keithley rack ears for their "brown" equipment. Also looking for tektronix tds8000/csa8000 rack ears. I have the existing panels to possibly trade, if yours is rackmount and you don't want it to be.

Also looking for rack ears and handles for hp/ agilent for a reasonable price, and a rack mount for the hp spectrum analyzers (ex 8591e etc.). Or the slides system for the hp 8566b 8568b spec analyzers.

Bonus if you have ears for venable 350a, racal-dana 6000 series meters, racal-dana 5002 wideband level meter,  or ears for Pico second pulse labs equipment.

If ya have any of these for sale let me know. I rackmount all my equipment, and having the ears helps greatly. Thanks.

[super7800]

Just bought (4) keithley 236 (300 each!) which i would love to get rack ears for, so I'll bump my wtb once, and probably never again.

On a side note, I know the 236 can be upgraded fairly easily to a 237, but can they be upgraded to a 238 (high current)? A 238 is much more useful to me than a 236 or 237.

[alm]

On a side note, I know the 236 can be upgraded fairly easily to a 237, but can they be upgraded to a 238 (high current)? A 238 is much more useful to me than a 236 or 237.

I highly doubt it. Compare the 236 pictures with 238 pictures. From what I remember, they moved some circuits (ADC?) between analog and digital board, and from the pictures they also changed some resistors. The 238 came out a bit later, so they wouldn't have designed the 236/237 with the 238 in mind.

As far as I know there's no service manual with schematics available, although there's a person on eBay selling a PDF with presumably full schematics.