Recharge and Service

[AlnicoRecharge]

I offer Recharge service at this time for all vintage Altec Alnico small format drivers. If your drivers are crudded up I also take apart clean and return then to service when possible. I am in upstate NY. Remag charge is $15.00 per driver. If I can be of assistance please let know. I have the tools and magnetize machine.

[Titanium Dome]

This should be moved to the market place.

[RKLee]

I offer Recharge service at this time for all vintage Altec Alnico small format drivers.
.
.An Altec newbie here, what are small format drivers?

[spkrman57]

Altec 800/900 series of drivers are 1" and considered the smaller variant.

Altec 200 series are the larger variant and 1.4" throats.

Hope this helps!

Ron


An Altec newbie here, what are small format drivers?

[AlnicoRecharge]

This should be moved to the market place.


My bad for posting this in the wrong place. I am new here. I should have looked around more before posting. I am not sure yet if the current charge fixture will fully saturate Large format Alnico. I think it will but untill I test this I don't want to say I can. If you have 2 or more small formats that need recharge I will do then for 10 bucks a pop. This includes pole piece alignment if needed. So far I am finding about 1 in 4 small format drivers from the 70's and 80's era are down approx 5% in charge and sometimes 10 percent. Now and again I find the pole piece has slightly shifted. This is bad because the Voice coil can rub. I suspect this is from being dropped. I can recharge with diaphragm in place.

[Thom]

I find this interesting and far from greedy. There are many drivers that appear similar. Let me show my ignorance and suggest the jbl 175. Are you able to do any of these. If not I'd be interested in knowing why not. Also, do you run across ones down more than 5 to 10 percent?

I wonder why they can't or don't re-gauss speakers with the cone in place. I had always presumed that the guasser fit where the spider goes but on "how it's mad" the other day they showed a speaker being made and while it was magnetised before being coned I don't see why (other than perhaps a high voltage spike at the terminals) it had to be. The speaker just fit in backside first and nothing mated with the front.

[Fangio]

I find this interesting and far from greedy.
Me 2. Plus I would appreciate to see a pic of such a machine.

[AlnicoRecharge]

I find this interesting and far from greedy. There are many drivers that appear similar. Let me show my ignorance and suggest the jbl 175. Are you able to do any of these. If not I'd be interested in knowing why not. Also, do you run across ones down more than 5 to 10 percent?

I wonder why they can't or don't re-gauss speakers with the cone in place. I had always presumed that the guasser fit where the spider goes but on "how it's mad" the other day they showed a speaker being made and while it was magnetised before being coned I don't see why (other than perhaps a high voltage spike at the terminals) it had to be. The speaker just fit in backside first and nothing mated with the front.


Gentlemen Thanks for the interest. It' not necessarily a matter of greed
it has to with fact that I am electronics engineer with a degree in mechanical as well and the fact that this is hobby of mine and I don't have lot's of overhead. I am a unique bird in that I try to help fund my hobbies and I enjoy giving back to my fellow brothers who share the same interest. I have some other surprises coming such as some replacement parts for old drivers that are not currently available. When I take on these endeavors I rely not only on my self but help from you as well. I am not superman, however I do have access to a full machine shop and I can mold plastic parts as I own a prototype shop. This allows me to make small runs of parts at a very reasonable cost. The magnetizer is a home built capacitor discharge machine with a purchased charge fixture. It packs a hell of a punch as is needed to over come the flux leakage because Alnico must be charged with a keeper and never have a large air gap or it will lose a good amount of it's charge. I am not familiar with the Jbl Line however charging these is and isn't rocket science. Most all voice motors use a simple 2 pole magnet and the trick is to supply enough magnetic field to saturate the material. Fortunately Alnico has a low coercive force. Ferrite and other rare earth types require more ampere turns however they also do not need a keeper so that means if the magnet can be removed it can be placed directly on the charge fixture to get more power to it. I will take some shots of the machine I built and post when I get home from work.

!oops for got to answer one question. I have seen one that was almost dead. I was able to fully recharge it.

[ratitifb]

i still use old alnico magnets to;)
i think AlnicoRecharge makes a very nice offer ! unfortunately for US :biting:nly

[bigyank]

:useless:

[Thom]

Gentlemen Thanks for the interest. It' not necessarily a matter of greed
it has to with fact that I am electronics engineer with a degree in mechanical as well and the fact that this is hobby of mine and I don't have lot's of overhead. I am a unique bird in that I try to help fund my hobbies and I enjoy giving back to my fellow brothers who share the same interest. I have some other surprises coming such as some replacement parts for old drivers that are not currently available. When I take on these endeavors I rely not only on my self but help from you as well. I am not superman, however I do have access to a full machine shop and I can mold plastic parts as I own a prototype shop. This allows me to make small runs of parts at a very reasonable cost. The magnetizer is a home built capacitor discharge machine with a purchased charge fixture. It packs a hell of a punch as is needed to over come the flux leakage because Alnico must be charged with a keeper and never have a large air gap or it will lose a good amount of it's charge. I am not familiar with the Jbl Line however charging these is and isn't rocket science. Most all voice motors use a simple 2 pole magnet and the trick is to supply enough magnetic field to saturate the material. Fortunately Alnico has a low coercive force. Ferrite and other rare earth types require more ampere turns however they also do not need a keeper so that means if the magnet can be removed it can be placed directly on the charge fixture to get more power to it. I will take some shots of the machine I built and post when I get home from work.

!oops for got to answer one question. I have seen one that was almost dead. I was able to fully recharge it.


Freight being what it is and such, I don't suppose you have considered moving to a state with much nicer climate, and not to be misunderstood, no hurricanes.

Actually many smaller compression drivers fit into prepaid postage boxes which makes them cheap to ship.

If you don't consider it too proprietory I would love details on your machine.

[AlnicoRecharge]

Freight being what it is and such, I don't suppose you have considered moving to a state with much nicer climate, and not to be misunderstood, no hurricanes.

Actually many smaller compression drivers fit into prepaid postage boxes which makes them cheap to ship.

If you don't consider it too proprietory I would love details on your machine.


Pic's are coming. I promise. hang tight.

[AlnicoRecharge]

Pic's are coming. I promise. hang tight.

The Digital Voltmeter is not operational. yet. This unit right now can
have a variable charge rate from Zero to 380 volts.

http://stonecastle.zftp.com/images/charger.jpg

[pelly3s]

That one is nowhere near as life threatening as mine lol. If you search around you will see the pictures of the machine at my place of work. I have been able to repair any ferrite or alnico driver that comes through. A 375 wants to jump out of the ring when charging it though some take a lot of pressure to hold them still.

[Thom]

That one is nowhere near as life threatening as mine lol. If you search around you will see the pictures of the machine at my place of work. I have been able to repair any ferrite or alnico driver that comes through. A 375 wants to jump out of the ring when charging it though some take a lot of pressure to hold them still.

When you say repair any, are you including broken magnets?
I'd sure hate to get hit by a jumping 375.

Are any details available such as how many turns and how much voltage and how many micro farads?

[spwal]

pelly3s (http://audioheritage.org/vbulletin/member.php?u=1022), are you atc audio in springfield?

[pelly3s]

yeah spwal i work there. Thom I can repair broken mags to an extent it does depend on how much damage there is to the mag

[spwal]

cool. I was told to contact you by New Zenith, suggesting to maybe remag the 2331. I dont think they need it personally, but I may drop them off one of these days... like sunday :)

what is your back log currently?

thanks

spwal

[spwal]

err... 2231

[pelly3s]

I should be able to do something fairly fast for you. We dont work sunday its our only day to rest lol. Really if they haven't been beaten and used well beyond their means they should be ok