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Amp Guts Photos - Official Thread - Lets see those pics

Should we also add Bass Guts to this thread too?

  • Yes, Allow Bass guts, afterall Guts is Guts

    Votes: 223 28.7%

  • No way! Keep 'em seperate

    Votes: 553 71.3%
  • Total voters
    776
#121
artiseasy said:
I love the guts of my SA200 so much that I had a custom plexi top cut for it.

GUTS GUTS - ALL THE TIME!!

3213842996_6bdfd3a8b2.jpg
Click to expand...

Nice!
 
#122
Jerrold Tiers said:
There are between 100 and 150 of them, all told. Some of that number were not sold, but were various types of proto and development unit, or "consumed" during solving an EMI issue..

They were all made in the SLM Yellville factory, before it closed, but during the Loud era. The Artist Relations folks grabbed most of them, but some were sold through to dealers and end customers.

Weighs about 22 lb, yes amp is Class -D, with SMPS, and works on any mains voltage from 100Vac to 240Vac with no changes or adjustments.

There was a delay shipping them due to solving a problem with a magnetic interaction between one of the inductors and the mains filter...... it put out a lot of EMI because the inductor was bypassing the filter and putting noise directly on the mains... the magnetic shielding wasn't good enough. That was eventually fixed.

Loud hasn't made any more, probably because they don't know how...... There are some tricky bits, and important specifications on certain parts. I'd not want to try to make those with chinese-made parts, lacking oversight and good QC........ been there, done that.

Yes, I do have inside info, but Loud hasn't asked me anything. But at least that design was good practice for the 50 to 200kW wind-turbine and biomass-to-energy electronics I'm doing now.

Loud are in position to make quite a number of 8PROs, if they solve their internal problems, because I know they have an open order with a supplier for a lot of power amp assemblies........ it's a cool amp, and deserves to stay around..... We originally came up with it as an outrageous Ampeg product....,. But I understand there is at least one higher power amp out now.

Pic of an 8PRO proto from way back.. you can see un-coated PWBs, and variously kludged wiring.

8proprot.jpg
Click to expand...



Thanks Jerrold for the info.
 
#124
I have been soldering for about 37 years.. since i was a kid... and back in the late 70s early 80s (before i was corrupted and found music full time) i worked for an aerospace / NASA contractor and got to witness some very exotic soldering techniques but never saw purple flux ever.. I looks like an inspection Dye to me... Just wish i knew... That Hiwatt is over the top clean inside!!!

Besides every great /expert solderer knows you must clean the flux from the joint after the process is done.. I think Harry Joyce would have done that knowing his MIL SPECs and other wiring artwork. The only time i have ever seen flux left on a joint is in poor quality consumer products. And it was always a yellow or amber color.

On many or all aerospace PC boards there is a conformal coating added after soldering and inspection. but the NASA stuff has a special coating that sort of holographed .. but that dye is not it,, perhaps it is a conformal coating in a non-PCB sort of way... I have just never seen that .
 
#125
#128
The solder that I was referring to was used in the telephone business. Always left that signature as I previously posted. Just because you guys in North America have never seen different colour fluxes doesn't mean that they do not exist in other parts of the world. However I suppose it could be dye but why? That's a lot of labour intensive costly work to go back over every single solder joint in a piece of equipment just to paint them!!

Paul
 
#129
BassmanPaul said:
... That's a lot of labour intensive costly work to go back over every single solder joint in a piece of equipment just to paint them!!

Paul
Click to expand...

Take a look at the closeup again...even the mounting hardware has the same dye. Probably for evidence of inspection and/or tampering.

http://www.talkbass.com/forum/showpo...3&postcount=88

Besides, would you want that much flux all over everything? It would just get sticky, attract dust which could eventually lead to tracking across the creepage distances and failure.
 
#133
Both him and Sadowsdy real nice wring jobs in amp..

Since its my thread, should we all put BAss GUTS in here too.. just cavity shots.. That sounds dirty Cavity shot...:)



...
BillyB_from_LZ said:
That's as pretty as the inside of one of Nino's basses (or at least the photos I've seen of his neat wiring methods).
Click to expand...
 
#134
that does make total sense... I need to ask my old timer amp tech from NY... he would know for certain....

and another post confirmed the dye on the mouting parts too. .it may be as you said

RockBobby said:
I bet the coloring/coating was, in part, to tell if the unit was serviced and what area was done.



.
Click to expand...
 
#136
Any MIL Spec Solderer would never leave Flux on a joint no matter what ..
Even commercial grade consumer products are pretty much void of flux... Flux residue is a total NO NO on any MIL SPEC especially NASA... and from Harrys art work, pristine approach to routing and harnessing i dont think he would slack off on the chore of flux removal. some old MIL SPEC would use triclorathene and NASA was a whole different story..

I doubt that is flux.. I agree with another poster that is may be an intrusion detection.. Since it is also on chassis hardware... Or perhaps a corrosion preventive.. but after seeing it on the hardware my money is on the Intrution detection..


I have heard of dyes being added to wave solder machines so the joint can be seen under ultraviolet light for inspection. but it is mostly water soluble so that the flux is easily removed... again the flux is removed from the set joint..

I have run out of information...
but this thread may open up some real cool disgutions//


BassmanPaul said:
The solder that I was referring to was used in the telephone business. Always left that signature as I previously posted. Just because you guys in North America have never seen different colour fluxes doesn't mean that they do not exist in other parts of the world. However I suppose it could be dye but why? That's a lot of labour intensive costly work to go back over every single solder joint in a piece of equipment just to paint them!!

Paul
Click to expand...
 

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