Carver PM1200 Amplifier Series Fan Motors...

[bobcan]

Hello all... Looking for any assistance from the obviously wise group at this site... I need to try to source "at reasonable cost" the Mabuchi Fan motors for Carver PM 1201 (circa 1993-94) Series Pro amplifiers (2 req'd per amp)... Way to much $$ last cost thru local sources!!

Appreciate any leads you can give here; require 12 pcs. minimum at this time, more to follow. Thank you in advance; bob

[Netlist]

Did you look at Farnell? Not really cheap but they have a great variety of fans.

/Hugo

[phase_accurate]

If they use the same ones as an old Carver amp that I have, then they are the typical small crappy motors as they are used for battery driven toys.
If one wants to use a nice modern fan then he has to more mechanical work than just changing a fan unfortunately.

Small motors like that can sometimes be found as surplus.

Regards

Charles

[bobcan]

Thanks on Mabuchi info... have got a couple of leads... if someone has exact old stock or Model # would still appreciate.. Happy techin' to all!! bob

[707dave]

Fan Model Mabuchi RS365SH looks like a close match. Note Carver appear to run the motor in reverse.

[tlparker]

Got a Carver pm 350 with screeching motor. Bending metal on sides helps/hurts, but I could see sparks in motor so knew things weren't good.

Took fan out. Motor is "Mabuchi" and with small flat-cap across back two leads. Looks like really cheap crummy motors compared to today's cooling motors, so I'm hoping to replace it with something better. Anybody know where I can get spec for this motor or enough info from something like wiring diagram to be abel to find replacement? This thing is like little heavy toy motor that you'd use to run a cheap car around with. Gotta be better way.

[bobcan]

The screeching would undoubtedly be the Armature rubbing against the Brush arms (?) which means the end is near.... Had some luck on a couple of Surplus suppliers, but still would use more if I could get them... should be $5.00 ea if you get a deal...

Original ones were in amps for 5 years of reasonable usage (Pro Audio) before gone bad, so cost is not unreasonable for the product usage!! Will post/ send any info if I find a "motherload" of these.... Take care all; bw

[tlparker]

While part of the problem is the fan blades grinding against the case (which is "finned" in this area to allow air flow) and that this is caused party by the armature being weak in its holdings, but also moves in/out slightly (mm's) dependent upon current flow, creates a very real motor issue.

I have already removed the motor. It is a piece of junk, similar to that used in a child's toy. If I could find a similar AC motor (like all the wonderful DC ones we now have) it would be a simple replacement. There is a CAP across the terminals which appears there solely to adjust the fan's speed in relation to the input voltate (and thus amp drawage in the case of this product).

Would love to hear realistitc solutions.

[sluffsmith]

I realize this is a old post. But I just bought a PM1201 and have a fan problem. One does not work and the other is really loud. So I need to replace them both.

Did Fan Model Mabuchi RS365SH work?
Is there other options?

Thanks for the help.
stew

[birdyman]

I am not sure how closeCaver PM1.5 and Caver pm 1200 are in their layout. I modified my PM1.5s by using 12v dc computer fans with ball bearings. Better CFM less noise. I made 7v for low speed and 12v for full speed, IIRC. I think a guy at the TheCarversite.com has original fans for sale if you like that toy fans.