Amp Guts Photos - Official Thread - Lets see those pics

[BillyB_from_LZ]

http://www.flickr.com/photos/44461607@N04/sets/72157632719434993/

My vintage EMC B800, currently under repair for use. I might consider making it stereo

I think I tried winning an eBay auction for one of those some years ago.

Interesting that it appears to have two power amp boards. Are they connected in the bridged mode?

 

[Megas3300]

I think I tried winning an eBay auction for one of those some years ago.

Interesting that it appears to have two power amp boards. Are they connected in the bridged mode?

Nope, they are independent of each other in terms of output. There are four output jacks, two per PA module. The back plate recommends a 4ohm speaker be plugged into each jack. Going by that they both supposedly support 2 ohm loads.

 

[MuthaFunk]

Nope, they are independent of each other in terms of output. There are four output jacks, two per PA module. The back plate recommends a 4ohm speaker be plugged into each jack. Going by that they both supposedly support 2 ohm loads.

That's not how I'd read that. I see it as it can take 4 ohms per side so in effect like being able to do 2 ohm load total but done via 2 seperarte amps. I think if you put a pair four ohm cabs on one side, it would blow that side. If I'm understanding you correct.

 

[Megas3300]

That's not how I'd read that. I see it as it can take 4 ohms per side so in effect like being able to do 2 ohm load total but done via 2 seperarte amps. I think if you put a pair four ohm cabs on one side, it would blow that side. If I'm understanding you correct.

Label reads: "For best performance use two or four (4) ohm speaker systems." Given the transistors, and trace widths, I believe this could handle the load.

 

[MuthaFunk]

Label reads: "For best performance use two or four (4) ohm speaker systems." Given the transistors, and trace widths, I believe this could handle the load.

Ahh I see! Cool! I'd bet it would be plenty loud with four (4) ohm cabs!

 

[coyoteboy]

Phil Jones B-type Piranha driver plucked from my 4B extension.

Heavy man!

 

[Mr. Foxen]

 

[BillyB_from_LZ]

View attachment 318566

Phil Jones B-type Piranha driver plucked from my 4B extension.

Heavy man!

Foam surrounds...EEK!

Any identifying labels on the drivers...like a little silver one?

 

[coyoteboy]

Naw, not foam.

Theres a label on the magnet stating a model # + type B Piranha.

 

[BillyB_from_LZ]

Naw, not foam.

Theres a label on the magnet stating a model # + type B Piranha.

What are the surrounds made of? Sure looks like foam from here. Rubber ones look rubbery, like a bicycle innertube.

 

[coyoteboy]

Yeah, rubber. The flash made hem look greyer than they are.

 

[delta7fred]

What make/model?

 

[Mr. Foxen]

What make/model?

Burman Pro2000, Need to make a sleeve for it as its from a guitar combo, but its the same iron as the bass one, so just has the option of distortion.

 

[Bassmec]

Beautifully made input section of a Standard Telephones and cable 1950's germanium transistor pre amp.
It's all hand wired on punched turrets with custom multiple impedance western electric transformers, inductors, impedance selector and switched gain attenuator.
Link Removed
Link Removed
That's dead posh! for a tranny pre amp.
PS Sounds just like an old germanium pre amp should, fooking awesome!. Think Chandler or real vintage Neve tone.

 

[Foz]

Just to get this pic in the thread... guts of my new Reiner [JGR] 6SL7 based Preamp. note teh dual Jensens - one for the DI and one for your balanced out to the PA amp.

Build thread here:

[Invalid or Expired Link Removed]

 

[svtb15]

Thats a work of art

Here's the guts of my Sunn 2000s

 

[basscooker]

the ampro's. simple, sexy.

 

[xk49w]

Here is another example of solid-state point-to-point construction. This is a Collins 618M5 VHF transceiver. There are many of these still flying in 747s, Lears, MD80s and others of similar vintage. The technology was referred to as "process A". All the parts are soldered to bifurcated teflon turrets pressed in to bent aluminum sheet.

 

[svtb15]

^That will last 1000 Years

 

[Mr. Foxen]

I've made a facebook group extension of my blog for people to post amp guts pictures, look up ampstack on Facebook. Only a few days old so mostly my pics.