I searched on the forum for the answer to this but nothing seemed to address the loss of a tone on just one manual. I know it's frequency number #27 that is not working, but it is on the lower manual only. The upper works fine. Does this issue point to a tone wheel or a connection of the manual to the TG? Where do I look to find a bad connection?
'Never ascribe to malice that which can be adequately explained by incompetence.' --N. Bonaparte
My friends call me Steve, won't you be my friend?
The cast, in order of appearance:
Kawai K5, Yamaha PSR-85, Thomas Trianon A-6820, Gulbransen 621-K, Conn 580 T-2, GEM WK1 ST
Hammond H-112, Ser. #16518, from 8/16/1971
Oh, and let's don't forget the Jaymar!
Tone 27 is only on the first 4 drawbars, yes?
D1, G1, D2, & D3. Those are the only notes I see (quickly) affected by this tone.
If they are all out with their corresponding drawbars yet they work on the upper manual, then I would trace the connection of the tone from the generator to the lower manual.
1st born: 1958 B3 & 1964 Leslie 122 Most Proud of: 1938 Concert Model E paired w/ 1948 Leslie 31A & Vibratone (Leslie) 30A (c.1942) Daily Workhorse: 3 Manual Rodgers running Hauptwerk 4.2 New Kid on the Block: Hammond Novachord (year not determined yet)
Tone 27 is only on the first 4 drawbars, yes?
D1, G1, D2, & D3. Those are the only notes I see (quickly) affected by this tone.
If they are all out with their corresponding drawbars yet they work on the upper manual, then I would trace the connection of the tone from the generator to the lower manual.
Yes, Joey, exactly. I'll take a look at the lower manual connection. I've never tried using a set of headphones and clips to test. Is this something you know anything about? I have no idea where to clip and listen from.
Will I need to pull up the manuals to check the wiring between manuals?
Frank
You will need to gain access to the wires from the TG to the manuals....so you may have to make some room....
On the TG, there are 4 Bakelite sections that make up the entire terminal strip. # 27 is second to last on the 3rd section (left to right). Trace that wire all its junction points.
1st born: 1958 B3 & 1964 Leslie 122 Most Proud of: 1938 Concert Model E paired w/ 1948 Leslie 31A & Vibratone (Leslie) 30A (c.1942) Daily Workhorse: 3 Manual Rodgers running Hauptwerk 4.2 New Kid on the Block: Hammond Novachord (year not determined yet)
The wiring loom goes from the generator to the upper manual, and from there on to the lower manual. Since your frequency #27 is only missing from the lower manual, we know that the connection at the generator is fine; your problem is in the last stretch of the wiring loom - between the two manuals. You need to check the terminal strips under both manuals. The under-manual terminal strips start at frequency #13, so your problem will be on the 15th lug counting from the bass end.
Current organs: AV, M-3, A-100
Current Leslies: 22H, 122, 770
The wiring loom goes from the generator to the upper manual, and from there on to the lower manual. Since your frequency #27 is only missing from the lower manual, we know that the connection at the generator is fine; your problem is in the last stretch of the wiring loom - between the two manuals. You need to check the terminal strips under both manuals. The under-manual terminal strips start at frequency #13, so your problem will be on the 15th lug counting from the bass end.
Thanks enor and Joey.
So, I guess this means lifting the manuals? I'll peruse YouTube for direction on this, unless someone has a better resource.
I've never tried using a set of headphones and clips to test. Is this something you know anything about? I have no idea where to clip and listen from.
To hear individual tonewheels through the speakers, clip a lead on a lowest drawbar and pull half wayout. Touch the other end of the lead to the solder tabs along generator and you will hear them individually sound through the speakers. Sorry if I'm late with this info.
To hear individual tonewheels through the speakers, clip a lead on a lowest drawbar and pull half wayout. Touch the other end of the lead to the solder tabs along generator and you will hear them individually sound through the speakers. Sorry if I'm late with this info.
Not too late at all! If I can ask a few questions.... The leads attach to a set of headphones? How does that work? Would a female stereo jack (1/4" or 1/8") with two clips on the other end do the trick? When you say "clip to a lowest drawbar", does that mean from the back side where the drawbar is soldered to the wire? Or clip right to the part of the drawbar with the numbers at the front of the organ? Sorry for what may seem like silly questions...
Not too late at all! If I can ask a few questions.... The leads attach to a set of headphones? How does that work? Would a female stereo jack (1/4" or 1/8") with two clips on the other end do the trick? When you say "clip to a lowest drawbar", does that mean from the back side where the drawbar is soldered to the wire? Or clip right to the part of the drawbar with the numbers at the front of the organ? Sorry for what may seem like silly questions...
Frank,
For the drawbars: just touch where the wire is soldered to the drawbar contact (in the back). The other end of that wire goes directly to the terminal on the TG you want to hear. But, as Twiggy said...only pull the drawbar out a couple of increments. Not too loud :-)
The headphones just get connected to each of the G terminals at the preamp (if you want to hear the organ out of headphones for testing). If not, the drawbar jump will just sound through your Leslie (or Tone Cabinet).
Joey
1st born: 1958 B3 & 1964 Leslie 122 Most Proud of: 1938 Concert Model E paired w/ 1948 Leslie 31A & Vibratone (Leslie) 30A (c.1942) Daily Workhorse: 3 Manual Rodgers running Hauptwerk 4.2 New Kid on the Block: Hammond Novachord (year not determined yet)
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