Who wants a power amp kit for free? **Out of LM3886 kits**

[joecool85]

Let me try to answer most of these.

The I used the feedback cap on my LM3886 because if I remember right it is just a good idea and helps keep you away from SPiKe protection kicking in.  Someone correct me if I'm wrong on that.  Regardless I did it.

For the on/off switch you'll want a 110v or higher and 3 amp or higher

I think I used a 3amp 1.25" glass tube fuse but a 2amp would be plenty (2amps x 110v = 220w)

If you have more questions, its not a problem.  I asked the equivelent of a 400 page novel before I built mine lol.

[RDV]

Just got my kit, Thanks Joe and Thanks Brian.

Just wondering on these things

-Which do I build, Whats the difference between the standard confiuration and the feedback capacitor

---> I used it. I don't think it makes too much difference.

-What rating and voltage should the on/off switch have and where does it goe i.e. before or after the transformer

---> A standard AC rated(110/220v) on/off switch will do and you put it between the AC line(hot) and the transformer(s).

-What kind of fuse, 2A 3AG or M205 or Ceramic Fuses.

---> Slow-Blo 3A should do the trick.

Thanks

-Dream

One other thing, I want to use the flipster as the preamp and power it from a different transformer, What is the safest way to hook two transformers up to one ac power supply.

---> Parallel. It sounds like you better do some reading before you start.

Also is this power supply regulated?

---> NO.

Please be careful.

RDV

[Bob N]

Damn! I wish I would have found this board earlier. I'm working on a guitar amp using The ROG Eighteen, Thundercheif, JCM800, and DR Boogey using sequential switching and wanted to mate them to an LM3886 based amplifier in a combo type install. I've already got the DR Boogey and the JCM800 built, tested, and tweaked the best I can and working on the Thunderchief this coming weekend.... oh well.... Everything is designed... Just got to pony up the cash for the parts.....

[joecool85]

Check out the LM1875 thread, it'll be $14 for a stereo LM1875 setup.  So 2x25w RMS.  You could bridge them or parallel them for 50w.

[DreamSeller]

Please be careful.

RDV

Thanks, Im not intending to hook it up until ive read over some things and triple checked everything.

-Dream

[joecool85]

^ Good plan.

[joecool85]

Stobiepole - in the mail.

[joecool85]

Aharon - I recieved your money, the boards will be in the mail monday morning.

[joecool85]

Aharon - The boards are in the mail.

[Aharon]

Got them today....thanks JOE !!!!!
Aharon

[RDV]

One things for sure guys, if you don't like the amp for guitar, it'll make a great all purpose power amp. I'm using them as stereo amps and guitar amps, and I'm working on one that will probably be used as a PA amp for single or duo-style gigs along with my rescued Mackie 1202VLZ.

The church my son plays in the band at gave us a burned out Peavey 2.6C which I'm putting two LM4780 chips(each wired in parallel) for a 100 watt per channel stereo amp. The heatsinks are already there as well as the on/off switches and circuit breaker. It'll be a cakewalk! I thought about fixing the amp already in it, but the circuit board had been on fire in two places! This thing will be sweet!

RDV

[Lithium600]

Any chance I could get in on one of those free kits if there are any left? It would be an enormous help for me. I really appreciate it.
Thanks,
Steven

[J M Fahey]

Mmmmmmmmhhhh , let's see.
So you become a member *just* to see if you can get a free amplifier kit.
Interesting.
Maybe you didn't notice that the thread is dead cold since June 2006.

[bry melvin]

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=320545833659&ssPageName=STRK:MEWAX:IT

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=320447070251&ssPageName=STRK:MEWAX:IT

couple of links for boards  cheap

I've only used these with TDA2050 though... and I haven't had time to finish the project  (studio reference powered speakers) so I can't guarantee their quality

[joecool85]

Any chance I could get in on one of those free kits if there are any left? It would be an enormous help for me. I really appreciate it.
Thanks,
Steven

Sorry, these kits are all long gone by now.  If you are interested in a kit, hang around and post often.  They go quickly, but I probably will do another give-away soon.