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Elkavox use microphone only

it sounds like the seller offered the accordion and the tone generator as separate items

that suggests to me the unit was offered for sale by a broker, not a member of the
accordion community, as separating the components of a working device,
a classic organ accordion, is simply not done.. it is a cardinal sin.

and while i can appreciate, jd, that you personally may see the entire value of
this device as a stand alone acoustic (with mics) the absolute fact is as soon
as you separate the accordion from it's accompanying tone generator, you have
lost the massive part of it's eventual re-sale value

again why i suspect this must have been offered for sale by a broker.. another
accordionist would never have allowed someone to unwittingly be tricked
into throwing away the better part of the value of this device
(and by device, that means the entire unit as originally designed/marketed/sold/used)
as soon as it was paid for by literally throwing away the tone generator,
which is worth absolutely nothing without the correct model and version
of accordion to connect it to.

say Jerry, i guess you have looked inside yours.. is the Mic pre-amp the only active
electronic circuit board actually inside the accordion body ? and the rest
of the internal components just passive switching hardware?

or are there other discreet active electronics also inside the body ?

i am thinking a CMOS controlled switching matrix perhaps ?

the more electronic sub-assemblies that connect "remotely" to the
Tone Generator through the cable then the more important to have the exact
model and series accordion/generator matched up

for Cordovox, the first several anyhow, the Firing cable was huge and all the
stuff in the accodion body were merely switches and the passive Mic's
 
say Jerry, i guess you have looked inside yours.. is the Mic pre-amp the only active
electronic circuit board actually inside the accordion body ? and the rest
of the internal components just passive switching hardware?
V, don't shake the finger at me, but the last time I looked under the hood was the late 80's so I cannot recall... but I can post a couple pages of the schematics, if that would help?

Of course guessing, all the main control is in the tone generator, and the switching control is in the accordion control paneling.
 
I guess another consideration is I believe these units had the older style microphones. Which are certainly ok but not as nice as more modern condenser units. If it were me I would consider how much effort it’s worth to use the original microphones vs a new microphone installation.
 
I guess another consideration is I believe these units had the older style microphones. Which are certainly ok but not as nice as more modern condenser units. If it were me I would consider how much effort it’s worth to use the original microphones vs a new microphone installation.
With regard to electret microphone capsules, we are easily talking about costs exceeding one or even several dollars. In other words: if you have experience with soldering, switching capsules out is a no-brainer. Old electrets may be of the three-wire variant (better linearity, lower output level). Modern electrets are pretty much always two-wire but often can be "rededicated" with a patent cutter to the right traces on their bottom. You need to watch for capsules with limited sensitivity (probably -52dB or lower (more negative)) or they'll clip in loud passages.
 
I guess another consideration is I believe these units had the older style microphones. Which are certainly ok but not as nice as more modern condenser units. If it were me I would consider how much effort it’s worth to use the original microphones vs a new microphone installation.
Back then I could not tell you the diff between any kind of mics, but I will say that mine sounded above average at gigs. That accordion begged to be played using the mics and of course all the additional electronics. I used a full 16 channels with the programmer 24, tone generator and 2 channels for the acordion.
 
. . . there are proprietary components in the original
Lowrey Organ/Tube Cordovox especially the sustain circuit mechanics which
has not been available for 60 years or so. It had a unique circular copper
leafy multi contact device switched by a double layer electromagnet. . .
I am always amazed at the ingenuity of the designers of the early electronic instruments. Through time, the mechanical parts of the design were replaced by electronics. Look at Hammond, with the model BC, (forerunner of the B3). To get the "Chorus" sound they had an additional chorus generator (two separate tonewheel generators). This generator had 35 tonewheels, tuned a few percent sharp and flat from a particular frequency on the main generator. To turn the "Chorus" On/Off, there was a drawbar on the upper right side of the console that actuated 35 leaf contacts to enable the "Chorus". This was later replaced with a rotating air capacitor and a delay line to get the frequency shift needed for the vibrato. This new design eliminated the need for the chorus tonewheel generator. To get various degrees of vibrato (V1, V2, V3), a helical gear on the vibrato knob vertical shaft rotated a horizontal shaft with cams that actuate a multi-contact leaf switch for the 3 degrees of vibrato (picking off different taps on the delay line). This vibrato leaf switch is under the drawbar case and goes about 1/4 of the way across the upper manual. These were neat designs using the technology that was available at the time.
 
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These were neat designs using the technology that was available at the time.

oh man you aren't kiddng

i once took apart and marveled at the forerunner of the Cordovox, which was
an add on kit Lowrey made for the institutional Church market that
literally added a Lowrey organ to a Grand Piano.. the Organo..

same 6x8 6fh8 and neon lamp design, but even bulkier more heavy duty
and housed in a huge separate cabinet plus the cool curved wood
15" James Lansing speaker

an add on control panel that looked a lot like the cordovox grill with
a knee activated switch mounted under the Piano keyboard and an
88 strip leaf contact rigged above the keys

that one still used 5u4 rectifier tubes
 
that one still used 5u4 rectifier tubes
Great tubes -- Some guys have replaced them in tube power supplies with a full wave solid state bridge rectifier. The higher voltage until the filaments warmed up the the rest of the tubes, sometimes fried components. Also, the operating voltage after tube warm up will be higher since the bridge diode forward drop is only about 0.5 volt. I'm not sure about the drop on a 5U4, but probably 10-15 volts.
 
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The tone generator is in full working order with midi however the supplier wanted too much for it and I can't afford and don't really need it so I will be continuing to work on making it work Tommorw. Will keep y'all posted
 
The tone generator is in full working order with midi however the supplier wanted too much for it and I can't afford and don't really need it so I will be continuing to work on making it work Tommorw. Will keep y'all posted

gee thats a shame

oh well

there were a million nice accordions out there with mics that work
to pic from without a classic Elkavox getting parted out,
but there was only 1 in a million players looking for a working Elkavox,
and who knows that might have been the last one on earth that
hasn't fried the electronics..

the modern world is upside down to some of us
 
gee thats a shame

oh well

there were a million nice accordions out there with mics that work
to pic from without a classic Elkavox getting parted out,
but there was only 1 in a million players looking for a working Elkavox,
and who knows that might have been the last one on earth that
hasn't fried the electronics..

the modern world is upside down to some of us
Im not going to part it out, I'm just going to make a connector so that I can use the original plug in. Accordion is not going to be modded at all
 
Ok this is a really poor demonstration however I just got home from work and I cannot be loud as people are sleeping.

https://streamable.com/62p96i

I show the voltage I'm using as well as what pins to connect to. In regards to terminals there are most likely better ones however im using what I have on hand. For power im using a generic usb charger . I was planning on using a buck converter to up the voltage but either mine is busted or my Input voltage is too low. Anyways lll try to get a better video Tommorw.

Goodnight y'all
 
Ok this is a really poor demonstration however I just got home from work and I cannot be loud as people are sleeping.

https://streamable.com/62p96i

I show the voltage I'm using as well as what pins to connect to. In regards to terminals there are most likely better ones however im using what I have on hand. For power im using a generic usb charger . I was planning on using a buck converter to up the voltage but either mine is busted or my Input voltage is too low. Anyways lll try to get a better video Tommorw.
Success! :)
Now, it will be a task of setting up a circuit that cuts down 9 volts to 5 volts and powers the left and right hand mics and you are done. Most people place the battery in the bass side, my recommendation is to fit it under the treble grill to make it easy to change and a good idea would be so that the circuit is completely disconnected from ground until you place a cable in to the mic output socket.
 
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