"orange wire to nowhere" - I suspect this power supply once lived in a 710.
Looked on Ebay to get an idea and the 700 only has two wires.Now that you mention it my 710 had four wires and a x-over board! Marked 760 on this PS.
So much more power than a tube amp. Repurposing an older wood box can reveal some rattles and other mechanical noises. Fully closed 45 back t-nuts needed a refit!
Got the last rattle out today,another 8 hours of run time on it. It's a '73 PS and '80 amp/x-over ready to roll onto the van. Sounded great with the L101 and L133 too Wes!
I just acquired a very early 760 wood yesterday (770 badged as a 760). It came as part of a very cheap package with an analog Korg BX3 and a valve combo preamp. The Leslie was in terrible shape. A beautiful wood cabinet that had been covered in tolex and had the front louvres cut out. To add insult to injury it had been chopped in half and the horns were sprayed white. I have just spent the evening stripping out the guts so that the cabinet can go to landfill tomorrow. The amp/heatsink had the yellow boards mentioned previously. See pics below. The cabinet badge said it was a 760 from the Hammond UK Sonorous works in North London.
Good find! That one is unseen around here,by myself at least! Have never seen a yellow PCB'd 760 before!
Those are the different amps as opposed to the later 'same' amps.
My 'orphaned' 430 amp boards are the bass amp type,the PS is a total one off with AC cable like an 11 pin, but instead it has a 5 pin socket for the other side cabinet.
These 'Quad' cabs had a space generator and lower styro drum(chorale only).Bizarre!
Researching a 'niche' product of a 'niche' product is laughable for sure!It has LDR's for some reason.
Guessing Don was searching new markets for his products on this one?
Interesting PCBs. The capacitor date codes point to 1972 construction, and the mounting hardware is different from all the boards I've seen. Typical PCBs are held to threaded stand-offs with hex-head machine screws. Are those held in place with nuts on studs?
Interesting PCBs. The capacitor date codes point to 1972 construction, and the mounting hardware is different from all the boards I've seen. Typical PCBs are held to threaded stand-offs with hex-head machine screws. Are those held in place with nuts on studs?
Yes nuts on studs. Strangely the PSU has the later 2 x triac design rather than the earlier 4 x SCR setup. I'm not sure what colour that board is yet - needs cleaning. It might have been modified to the later triac circuit. I believe I have done this in the past with a couple of links added.
Yes nuts on studs. Strangely the PSU has the later 2 x triac design rather than the earlier 4 x SCR setup. I'm not sure what colour that board is yet - needs cleaning. It might have been modified to the later triac circuit. I believe I have done this in the past with a couple of links added.
The power supplies are effectively interchangeable, and at this point in history, we do find lots of Leslies that have been repaired or modified via amp or power supply swaps. I've lost count of how many times I've found a 147 amp in a 122 cabinet or vice-versa.
The power supplies are effectively interchangeable, and at this point in history, we do find lots of Leslies that have been repaired or modified via amp or power supply swaps. I've lost count of how many times I've found a 147 amp in a 122 cabinet or vice-versa.
I did restore an early orange/yellow boarded PSU from an 825 once. The traces were coming off in places and I had to install a few jumpers to make it work. I think the later green boards were alot more durable.
I did restore an early orange/yellow boarded PSU from an 825 once. The traces were coming off in places and I had to install a few jumpers to make it work. I think the later green boards were alot more durable.
You see the same thing in Combo Preamp circuit boards. Early ones were phenolic and were easily damaged. Later ones were fiberglass.
Never touch the best one! Start with the worst and move up.
I disagree Tim!
When they don't need more than a basic service,having a pair ready fast and easy was on my radar.
The two that needed the least work and are gigging boxes.They are already in 122 and 45 cabs. Already in use and hum free loud and clean!
Some electronic cleaning and solder reflowed,some triacs replaced.Not much needed surprisingly.Basic service as in the manual.
Twenty five hours each so far,no glitches.
The other two still work,will get a thorough check, and are in need of cosmetics. I have two full size wood boxes already to recase them.
To their credit,Leslie did introduce the 770 not long after the 760.
No worries,I recycle the decks and hardware. Lots of useful things to harvest. Apologies to fans of tolex covered Leslies.
As in the evolution of many things,louder and plastic go together!
That 430 amp plate with orange boards are spares only. Not as well made as the green boards.
At this time nine of twelve boxes in the collection are ready to use.
Can't lose on this. Well......maybe my hearing LOL.
Over here, at least, the 760 was initially introduced as the '760 Walnut' and '760 Black'. I sold quite a few and had a 760 Walnut on my T400. Both in the 147/122 cabinet but with the 'black' one having a sprayed on black crackle finish and two rather small handles. It was only when the tolex covered 825 and 760 'Pro Line' models were introduced that the 760 Walnut became the 770. Hammond Europe (always a law unto themselves) came up with lots of variants on the 760, like the '760N' shown at the right!
How does the shortie 760 in the 45 cabinet sound, Pete? Enough bass? I know they always pushed the 147 over the 145 for its 'extended bass response', but I never found the 145 lacking in any way.
Attached Files
It's not what you play. It's not how you play. It's the fact that you're playing that counts.
Andy, the shorty has lots of bass.Great sounding box.
Let me second that - I also have such a box (760 guts in a 142 cabinet). Bass is maybe a wee bit softer than a tall model, but on the other hand it's tighter and more responsive.
Current organs: AV, M-3, A-100
Current Leslies: 22H, 122, 770
Over here, at least, the 760 was initially introduced as the '760 Walnut' and '760 Black'. I sold quite a few and had a 760 Walnut on my T400. Both in the 147/122 cabinet but with the 'black' one having a sprayed on black crackle finish and two rather small handles. It was only when the tolex covered 825 and 760 'Pro Line' models were introduced that the 760 Walnut became the 770. Hammond Europe (always a law unto themselves) came up with lots of variants on the 760, like the '760N' shown at the right!
How does the shortie 760 in the 45 cabinet sound, Pete? Enough bass? I know they always pushed the 147 over the 145 for its 'extended bass response', but I never found the 145 lacking in any way.
The wood cased 760 I scored as part of a package deal with my BX-3 recently was a crackle finish. Unfortunately it had been cut in half and had open hand holds cut in the base enclosure. The owner had also cut out the upper louvres into large rectangle holes which for me was the point of diminishing returns and I sadly gutted it and send the case to landfill. I am planning to finish my own wood cabinet 760 in crackle finish as it is matt black at the moment. Having owned a 122 and 147, the 760/770 always does it for me!
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