Repair a Hammond Organ?

I could not resist buying this. A heavy Hammond Organ. It appears to be
from the early 70's. A local second hand store had it for $5 marked
(AS-IS). The wooden cabinet is near perfect. But there is no plug on the
cord, so they could not test it (and they dont do any repairs).

I was hoping it had tube electronics, but it appears to be solid state,
meaning that if there are circuit problems, I probably wont be able to
fix it, since I only work with tubes. But I already know the speakers in
these organs are worth a lot more than $5, and I can see making
something from the wooden cabinet.

This is likely one of the most complex pieces of electronics I ever will
attempt to fix. Then again, for all I know, it may work once I put a
plug on the cord.... (It looks like the plug was torn off when they
moved it).

Either way, I know I got my $5 worth of parts at the least...

This thing is heavy, heavy, heavy.... The workers at the store were all
women and did not want to help load it. And I have physical problems
which limit me. So I still need to get some guys to help me with it next
week. I just paid for it and they have my name on it, marked SOLD.

Before I left, I wrote down the model #.

I am NOT finding any schematic online. If any of you know where to find
one, it's a model # 227214. Appears to be called a "Aurora Custom 1
(AV28)" (from what I could find online).

I am no organist, but if I can get this thing working, I know I'll have
fun with it....

photos of the innards of a similar model:
https://monkey.org/~smart/hammond/index.html

top view
https://en.wikipedia.org/wiki/File:Hammond_Aurora_Classic.jpg

 

[MJC]

In article <n0b1bc1agjpqo6l6es1kijs5nj4rhe8no3@4ax.com>,
oldschool@tubes.com says...

top view
https://en.wikipedia.org/wiki/File:Hammond_Aurora_Classic.jpg

Wow, looks like the sort of thing that should rise into view in a cinema
on a lift being played very ostentatiously (Carlo Curley or
Liberace?)...

Mike.

 

[Kenny]

wrote in message news:n0b1bc1agjpqo6l6es1kijs5nj4rhe8no3@4ax.com...

I could not resist buying this. A heavy Hammond Organ. It appears to be
from the early 70's. A local second hand store had it for $5 marked
(AS-IS). The wooden cabinet is near perfect. But there is no plug on the
cord, so they could not test it (and they dont do any repairs).

I was hoping it had tube electronics, but it appears to be solid state,
meaning that if there are circuit problems, I probably wont be able to
fix it, since I only work with tubes. But I already know the speakers in
these organs are worth a lot more than $5, and I can see making
something from the wooden cabinet.

This is likely one of the most complex pieces of electronics I ever will
attempt to fix. Then again, for all I know, it may work once I put a
plug on the cord.... (It looks like the plug was torn off when they
moved it).

Either way, I know I got my $5 worth of parts at the least...

This thing is heavy, heavy, heavy.... The workers at the store were all
women and did not want to help load it. And I have physical problems
which limit me. So I still need to get some guys to help me with it next
week. I just paid for it and they have my name on it, marked SOLD.

Before I left, I wrote down the model #.

I am NOT finding any schematic online. If any of you know where to find
one, it's a model # 227214. Appears to be called a "Aurora Custom 1
(AV28)" (from what I could find online).

I am no organist, but if I can get this thing working, I know I'll have
fun with it....

photos of the innards of a similar model:
https://monkey.org/~smart/hammond/index.html

top view
https://en.wikipedia.org/wiki/File:Hammond_Aurora_Classic.jpg

This any help? https://archive.org/details/HSM4952016
Maybe try this forum: http://www.organforum.com/forums/

Kenny

 

[Kenny]

"Kenny" wrote in message
news:EPqdnZUh17YZQC3FnZ2dnUU78cHNnZ2d@brightview.com...

wrote in message news:n0b1bc1agjpqo6l6es1kijs5nj4rhe8no3@4ax.com...

I could not resist buying this. A heavy Hammond Organ. It appears to be
from the early 70's. A local second hand store had it for $5 marked
(AS-IS). The wooden cabinet is near perfect. But there is no plug on the
cord, so they could not test it (and they dont do any repairs).

I was hoping it had tube electronics, but it appears to be solid state,
meaning that if there are circuit problems, I probably wont be able to
fix it, since I only work with tubes. But I already know the speakers in
these organs are worth a lot more than $5, and I can see making
something from the wooden cabinet.

This is likely one of the most complex pieces of electronics I ever will
attempt to fix. Then again, for all I know, it may work once I put a
plug on the cord.... (It looks like the plug was torn off when they
moved it).

Either way, I know I got my $5 worth of parts at the least...

This thing is heavy, heavy, heavy.... The workers at the store were all
women and did not want to help load it. And I have physical problems
which limit me. So I still need to get some guys to help me with it next
week. I just paid for it and they have my name on it, marked SOLD.

Before I left, I wrote down the model #.

I am NOT finding any schematic online. If any of you know where to find
one, it's a model # 227214. Appears to be called a "Aurora Custom 1
(AV28)" (from what I could find online).

I am no organist, but if I can get this thing working, I know I'll have
fun with it....

photos of the innards of a similar model:
https://monkey.org/~smart/hammond/index.html

top view
https://en.wikipedia.org/wiki/File:Hammond_Aurora_Classic.jpg

This any help? https://archive.org/details/HSM4952016
Maybe try this forum: http://www.organforum.com/forums/

Kenny

http://www.terapeak.com/worth/hammond-aurora-custom-model-227222-227214-schematic-diagram-nos/371534107566/

 

On Sat, 25 Feb 2017 01:27:32 -0000, "Kenny" <me@privacy.net> wrote:

This any help? https://archive.org/details/HSM4952016
Maybe try this forum: http://www.organforum.com/forums/

Kenny

Thanks, but neigther of these links seem to have any schematic for my
model (Hammond model # 227214. Called an "Aurora Custom 1 (AV28)".

 

On Sat, 25 Feb 2017 01:30:07 -0000, "Kenny" <me@privacy.net> wrote:

Kenny

http://www.terapeak.com/worth/hammond-aurora-custom-model-227222-227214-schematic-diagram-nos/371534107566/

I was already to cough up the $10 for this paper manual, when I clicked
on "BUY", it took me to an Ebay page that "does not exist". Probably
another useless ancient link to something that google dont seem to ever
remove. From what I've been seeing lately, google never removes outdated
links. I've been seeing around 35% of the links on google are obsolete
lately.

 

[Dave M]

Have you tried to contact Hammond for service information? If not, send
them an email with all of the nameplate information and see if they can
help. http://hammondorganco.com/contact-us/service-department/?
Many manufacturers will provide service info free on models that have been
out of production for many years.

Cheers,
Dave M




oldschool@tubes.com wrote:

On Sat, 25 Feb 2017 01:27:32 -0000, "Kenny" <me@privacy.net> wrote:


This any help? https://archive.org/details/HSM4952016
Maybe try this forum: http://www.organforum.com/forums/

Kenny


Thanks, but neigther of these links seem to have any schematic for my
model (Hammond model # 227214. Called an "Aurora Custom 1 (AV28)".

 

On Sat, 25 Feb 2017 17:48:00 -0600, "Dave M" <dgminala@mediacombb.net>
wrote:

Have you tried to contact Hammond for service information? If not, send
them an email with all of the nameplate information and see if they can
help. http://hammondorganco.com/contact-us/service-department/?
Many manufacturers will provide service info free on models that have been
out of production for many years.

Cheers,
Dave M

This is a good suggestion. I'll give it a try!

Thanks

----

oldschool@tubes.com wrote:
On Sat, 25 Feb 2017 01:27:32 -0000, "Kenny" <me@privacy.net> wrote:


This any help? https://archive.org/details/HSM4952016
Maybe try this forum: http://www.organforum.com/forums/

Kenny


Thanks, but neigther of these links seem to have any schematic for my
model (Hammond model # 227214. Called an "Aurora Custom 1 (AV28)".

 

On Saturday, February 25, 2017 at 5:21:17 PM UTC-5, olds...@tubes.com wrote:

On Sat, 25 Feb 2017 01:30:07 -0000, "Kenny" <me@privacy.net> wrote:


Kenny

http://www.terapeak.com/worth/hammond-aurora-custom-model-227222-227214-schematic-diagram-nos/371534107566/

I was already to cough up the $10 for this paper manual, when I clicked
on "BUY", it took me to an Ebay page that "does not exist". Probably
another useless ancient link to something that google dont seem to ever
remove. From what I've been seeing lately, google never removes outdated
links. I've been seeing around 35% of the links on google are obsolete
lately.

Actually I can understand why when you search for tube stuff you'll get more broken links. The extinct bound are probably going to get more of that in the future. Hell, I can't even find good food anymore.

Dude, I had to make the transition from tubes to transistors and so can you.. On tube TVs I had a superfast method which involved shorting things out. I took a grounded screwdriver to the plate cap ot the horizontal output tube which showed me immediately if there was B+ and if the damper tube was conducting. That ain't the half of it, I cured the Zenith ringing in the video problem.

You can do it too. I just had to learn just how fast transistors can be destroyed. With tubes I oculod short things out and see how long it takes for one of them to redplate and thus eliminate the need for a tube tester. That was radical, but it got results which paid the bills.

Solid state is a bit more tricky.

One of the first things is to figure out which section is faulty. Is it the amp ? If so that might be easy. The tone generators are a different story. In an older organ there will be 12 of them. Find an amp and connect SOMEHOW so you can determine all 12 of those generators work. If not, burn it.

I shit you not. It is too damn hard to find parts foro those things. Even if you do then they run out of tune whenb they heat up n shit. One thing you need for an organ or an older electric piano or anything like that is to have the tone generators working properly. If youu don't have that ytou willl be looking for germanium transistors, some of which have not been made in all my born days. Coils and capacitors it will take you three days to find on Digikey, if you can at all. And of course that depends on you getting the inforation on these parts, Digikey doesn't know, how could they ?

Another bottom line, power circuits blow first. It is entirely possible that your tone generators are fine. You have to test it with another amp. somewhere in there is the output going to the amp, if the thing powers up that is where you start. Connect it to anything. Even an elcheapo pair of PC speakers should do it. Test every key. If they all work we move on to the next step. You be lucky if all them tone gennies work and you just have to fix the amp.