Lowry Organo -for parts?

[Robster]

I pulled all the tubes from a Conn organ siting in an appliance graveyard. It had about 96 RCA cleartop 12au7 that the audio guys go nuts for.
Kept what I could use, sold the rest. Wish I had gotten the speakers and amp chassis parts too. The one I found was a wreck sitting in the rain...
Maybe some organ guys would buy it from you if you dont want to hack it...
Good luck.

[Phil_S]

I've spent some time over the last few days hacking the thing. I've got the wiring harness stripped, removed the PA from the wood frame, and begun to disassemble one of the 12 tone generator boards. I can tell you, the wiring job in this organ was a meticulous work of art. Every connection, every wire, was placed and soldered by masterful hands. The wax string ties on the wiring harness were a fine example of a lost art. I hated to cut the wax twine. Alas, there was no turning back. I must have 100' of cloth wire, maybe 10 colors, #18 stranded and I think #22 solid. Some runs of wire are 3-4' long. Others are 8-16". I've got 15 bits of black that are 4" each.

This thing is loaded with .01, .0047, and .0068 600V green Tropicaps and a dozen bumble bees. Unfortunately, if I read the stripes correctly, the valuable BB caps are .022, and I think I only have 2 of those.

Each of the twelve little boards has 3 Tropicaps, 1 BB, 8 or 9 red Erie disk caps, ~ 3 dozen carbon comp resistors, possibly something else. I am guessing, if I made this a "vacation project" it would take me a whole week to extract all the parts and sort them. What surprises me most, though is how many of the parts are commonly used in guitar amps. I was half expecting a pile of stuff that generally isn't used. There are also several thingies (technical term) that are about 1" square and have a number of leads. When I have one free, I'll post a picture -- maybe someone knows what it is.

[Phil_S]

Here is a picture of a partially disassembled tone generator board. There are some curiosities, like the phenolic strip covered on both sides with tin -- it was up in the air supported by whatever was soldered to it. I suppose the assembly worker must have had a jig to hold in place as it was perfectly aligned.

Anyone know what the tan square 21X-75 thing is? There are 7 leads out the bottom. The brand seems to be <CRL> inside a diamond box. The reverse side is plain.

[Travst]

A bit off-topic, but how are the Lowry preamp tubes regarded? I have a chance to pick up a few NOS cheap.

[Alexo]

A bit off-topic, but how are the Lowry preamp tubes regarded? I have a chance to pick up a few NOS cheap.

Could be wrong, but I think they are re-branded Syl's and GE's.

[Firestorm]

Anyone know what the tan square 21X-75 thing is? There are 7 leads out the bottom. The brand seems to be <CRL> inside a diamond box. The reverse side is plain.

CRL made caps (among other things), so I bet that is a "tone network" like the ones Ampeg always used to use. You could try measuring the legs and see what you find. Maybe look at Ampeg schematics for a hint at what values are inside.

[Travst]

A bit off-topic, but how are the Lowry preamp tubes regarded? I have a chance to pick up a few NOS cheap.

Could be wrong, but I think they are re-branded Syl's and GE's.

Great, I figured they were re-branded, but didn't know who made them. I'll grab them up... 12AU7s for my GA-95.

[Alexo]

A bit off-topic, but how are the Lowry preamp tubes regarded? I have a chance to pick up a few NOS cheap.

Could be wrong, but I think they are re-branded Syl's and GE's.

Great, I figured they were re-branded, but didn't know who made them. I'll grab them up... 12AU7s for my GA-95.

If you study them carefully, you can probably find their non-rebranded brethren here: http://www.tubemongerlib.com/gallery2/v/12AU7/

[Phil_S]

The 12AU7's are all GE, not rebranded anything. I have all but 2 of them, which I sold a while back. I believe I offered them here. If interested in having a few (or even all of them) PM me. Meanwhile, I'll list them for sale in the appropriate place.

Selloutr: I still have your email. I'm slow

[Phil_S]

Anyone know what the tan square 21X-75 thing is? There are 7 leads out the bottom. The brand seems to be <CRL> inside a diamond box. The reverse side is plain.

CRL made caps (among other things), so I bet that is a "tone network" like the ones Ampeg always used to use. You could try measuring the legs and see what you find. Maybe look at Ampeg schematics for a hint at what values are inside.

This is more a point of curiosity than anything else at this point. I didn't imagine I'd have a use for them or that they'd be good eBait fodder.

There is continuity from lead to lead, but with 7 leads, there are too many combinations to check. I have the 12AU7 tube pin connections to correspond to the item:
lead 1 to pin 1
lead 2 to pin 7
lead 3, not on tube socket
leads 4 & 5 soldered to the tin bar; I guess this was ground.
lead 6 to pin 2
lead 7 to pin 6
So, that's plates and grids.

Clipping the black probe to lead #7, hear are the resistance readings going across:
#1 193K
#2 483K
#3 102K
#4 555K
#5 151K
#6 396K

Honestly, I don't think that tells us very much.

I thought maybe someone would recognize it.

[selloutrr]

Here is a picture of a partially disassembled tone generator board. There are some curiosities, like the phenolic strip covered on both sides with tin -- it was up in the air supported by whatever was soldered to it. I suppose the assembly worker must have had a jig to hold in place as it was perfectly aligned.

Anyone know what the tan square 21X-75 thing is? There are 7 leads out the bottom. The brand seems to be <CRL> inside a diamond box. The reverse side is plain.

it's a multi capacitor they were also used in the Sundown SD1000/Artist prototype amps. You can see it on the schematic as a dotted line box around the tone stack.

[Phil_S]

Well, thanks! So, at 4/tone unit, I've got 4 dozen of them. You think there might be some value on ebait? How to properly describe them?

[selloutrr]

meter the values and if they are usuable in the ampeg or sundown amps then you could market them as Ampeg, Sundown, tone network capacitors, post a few clear pics and probably move a few. To the best of my knowledge they were only used in 5 of the 2500 sundown amps produced. If they are the correct values I'll buy two as spares. later production switched to the small circuit board.

[Phil_S]

Selloutr: If you want a couple, say so and I'll mail them to you. I have no idea what they are worth and whether they are suitable for what you intend. Maybe, in exchange you'll be able to tell me what I have here.

They are similar but not the same shape as what I see in your pictures.

Phil

[selloutrr]

I metered your CLR 21X-75 resistor network attached are the pin to pin readings.