When will I ever learn? (SB-101)

[Walt Heilsnis - WB2VSJ]

Start with the calibration procedure in the manual, you may find areas that are aren't providing the correct voltages  and start the trouble shooting there.

Good Luck,

Walt - WB2VSJ


-----Original Message-----
>From: Kenth B Astrom <kenth at TOTOKET.COM>
>Sent: Mar 8, 2010 8:51 AM
>To: HEATH at LISTS.TEMPE.GOV
>Subject: When will I ever learn? (SB-101)
>
>Dear Team,
>
>Ok, just picked up this cosmetically perfect SB-101 off eBay, heck the ad
>even showed it 'lit up' and with "all tubes seems to glow"....."not tested
>but picked up from a relative".....which seems to be the norm for DOA.
>
>At any rate, it passed the smoke and smell test using a variac but that's
>just about it.
>
>Plugged in antenna and headphones to see if I could pick up some sigs on 20
>but to no avail. Very quiet. 
>
>So I switched on the built in calibrator 'CAL' and started to sweep up and
>down to pick up the loud calibration signal, but not even that was heard
>anywhere across the band.
>
>Next trying to get it to tune up a few watts, I swithed it to 'TUNE' and
>started janking the preselector and final tune knobs - nothing. Does not
>even show plate current, grid current or 'HV' on the meter, when its
>switched to those positions.
>
>Now starting to suspect the PS, I switched to another HP-23 that I have
>sitting on the shelf and that I know is working. To no avail - same
>depressing result.
>
>From what I remember from my electrical engineering and tranceiver theory in
>school (looong time ago..) since it neither receives nor transmits, it must
>have something to do with circuitry common to both of those functions,
>right?
>
>I would not even know where to start, so any help would be greatly
>appreciated. Does anyone even have a circuit diagram for this baby?
>
>Lesson learned (again..) about picking up vintage stuff off eBay....
>
>Thanks in advance!
>
>Regards / 73 de
>Kenth / W1JKP
>

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