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ZL1BVO > ULTRAS 17.08.05 14:31l 22 Lines 856 Bytes #999 (0) @ WW
BID : 270043ZL1BVO
Read: GUEST OE7FMI
Subj: tempo 400 circuit
Path: DB0FHN<DB0MRW<DB0WUE<DK0WUE<7M3TJZ<KP4IG<IW2OAZ<ZL2BAU<ZL2WA<ZL1UX<
ZL1BCO
Sent: 050816/1548Z @:ZL1BCO.#27.NZL.OC #:61197 $:270043ZL1BVO
From: ZL1BVO@ZL1BCO.#27.NZL.OC
To : ULTRAS@WW
Hi Gang,
I have a small parts cleaner which has given up working in the ultrasonic
department. I have removed the ultrasound board and removed all the burnt
out parts --- w/wound resistors, capacitors, replaced 555 timer IC, the
NPN transistor is fine, as are coils, transformers etc. As the burnt out
parts are unrecognisable as to value, I have replaced them with values
which I reckon should have made it operate, but still no oscillation, even
after trying slightly different values, and same w/w resistors start to
cook. Have looked on the internet for the circuit to no avail, so am
pleading for help with a circuit diagram of the beast.
If anyone has a circuit I would be eternally grateful.
Graham ZL1BVO @ ZL1BCO.NZL.OC
email zl1bvo@paradise.net.nz
snailmail 104 Elizabeth St. Taupo 2730
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