Zero Ohms on reverb tank input?

[Satamax]

Hi everybody!

Zero ohms on a reverb tank input, that indicates dead reverb tank right?
Little transformer dead i supose? Worth checking if there's a short circuit in the little trany or changingh it? Or change the reverb tank directly?

Thanks a lot.

Max.

[Rob Mercure]

Hey Max,

I've never seen a shorted reverb tranny before so I'd probably go over it and see if there isn't a short in the wires connecting the tranny to the jack - open coils are the norm and I've often swapped input and output coils between pans to make a pan with an impedance pair that I didn't have in stock at the time or to make one good pan from a couple of bad ones.

Rob

[Satamax]

Ok Rob. Thanks a lot for your reply.

I'll check what i can do with this one.

Thanks again.

Max.

[Twist]

A resistance reading of nearly zero ohms would be typical for a transformer driven tray. Are you using an analog meter? I wouldn't discard the tray yet.

[Satamax]

A resistance reading of nearly zero ohms would be typical for a transformer driven tray. Are you using an analog meter? I wouldn't discard the tray yet.

Hi Twist.

Well, i know, something like two ohms is about usual, but this one with my tekmeter/scope thingy reads 4kohm and goes down to zero quite quickly. If i couls test it with my wave generator would be nice but it doesn't seem to work with the low impedance.

Thanks again and best regards.

Max.

[Rob Mercure]

They typical Fender style pan has an input impedance of about 8 ohms and a DCR of 4-5. I've never seen one that has no DCR - ths coil is quite a few turns of fairly fine wire.

Rob

[oc disorder]

According to the accutronics impedance chart found at

http://www.accutronicsreverb.com/impchart.jpg

the lowest DC resistance reading of the transducer coil in their range is 0.81 ohms.

http://www.accutronicsreverb.com/prodspec.htm

By clicking on the reverb type on this page their numbering system is explained and the impedances given.
The 2'nd and 3'rd letters give the value of impedance - input and output
respectively. The impedance chart gives the approx DC resistance.