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Can you remind us which model organ this is? Early Hammond organ organs depended on a B+ supply from the tone cabinet to provide HT for the valves in the organ pre-amp. This B+ voltage will not be

A little more information on the Hammond Echo switch... If I connect the 5-pin pigtail output from the organ to the 6-pin input on the JR-20, the tubes in the tone cabinet light up - but no

"maybe 20-30 years from now..." Maybe even longer, the organ has already survived for 50 years or more. It may never need attention to the tone wheel pick-ups

Hello Cristoph, Thank you for sharing your experience with the TrekII replacement. Finally I just did what you suggested, I could move the magnets with their screws tightened, so the calibration is

I suspect that the output impedance of the original tone generator pick ups will also be quite reactive, probably inductive. The transient produced when a key contact makes will likely be a short

Happy New Year, everyone. Hi Matyas, hi Scott, as much as I estimate your expertise, Scott, I would like to tell you about an experience I recently made with a B3 having such a TrekII GNR-1A

Hi Scott! Thank you for your reply! We were considering the TrekII or other simple sine wave generator solution. But the fact that there were two open coils (300+ USD) and the purist approach of the

Use the Trek II note-replacement kit. It is easy to install and works perfectly.

Dear Group! I need your collective mechanical wisdom on removing broken screws. I am in the middle of fixing a Hammond RT3 that was in the shed for twenty years. Now, I have been fixing Hammonds for

Here's a question for the veterans, I'm afraid. I was fortunate enough to acquire a BCV this week - the earliest model I've ever owned or worked on.? (This one built in late1938 I believe, judging

I see my email address was masked. It's rproulx22 AT Gmail DOT com

I could not find anyone who wanted a working H-112 that was given to me, so I took it apart so it could more easily be discarded. All the wood parts went for recycling and the keys to a sculptor

Hello Group I have spent considerable time on both switches in the combined assembly. (MAIN & ECHO) ...in situ ...not removed from the organ. I identified the switching mechanism action ...the

Thanks to all of you. It's very helpful for me :-). Yes, I also didn't notice any significant difference between different T model organs regarding the vibrato drive and, most important, recovery

Early H models had a square scanners that had more poles on the inside than the earlier consoles. This square scanner was apparently temperamental and was later replaced by the drum

Only T- series organs were produced with both types of scanner as far as I know. Some later models were only made with drum scanners (H-series?). Electrically, the capacitance between stator and rotor

Chris is right what the no-difference within the T-series is concerned. But compared to the consoles (A-100, -2 -3 organs) the delayline of the T-series organs is one LC bin shorter

To the best of my knowledge, their are no differences in the vibrato drive, vibrato line, or vibrato recovery circuits used in organs with either type of scanner. The schematics for early T-series

Hi, I've seen different types of vibrato scanners in otherwise similar organs: My TTR-100 has a self starting motor, it's scanner is of the same pan type as in consoles from B-2, C-2 etc. on, but

Thanks, you were very helpful! Best regards!