Members Rezrover Posted May 21, 2010 Members Share Posted May 21, 2010 Somebody want to help this guy out? He posted this in the Monster Rack Forum: Help me identify this gear! So I just bought this rack to house my new gcx controlled rack rig and low and behold it comes with a piece of gear already inside! The problem: I have no idea what it is. Help me! What is this/what does it do!? Thanks Adam Link to comment Share on other sites More sharing options...
Members Axisplayer Posted May 21, 2010 Members Share Posted May 21, 2010 None of the links work for me, so making an ID will be tough. ;-) EDIT: So I went to the original which did work and still have no idea what it is. Looked like a patch panel until I saw the wiring on the back of the panel. Link to comment Share on other sites More sharing options...
Members Rezrover Posted May 21, 2010 Author Members Share Posted May 21, 2010 EDIT: So I went to the original which did work and still have no idea what it is. Looked like a patch panel until I saw the wiring on the back of the panel. Yeah, that mess is what threw me too. Link to comment Share on other sites More sharing options...
Members dennis a Posted May 21, 2010 Members Share Posted May 21, 2010 This is my take on it...back in the day, Amplifiers didn't have a timed power up sequence. They just turned on. If there was a power hiccup, there would be a big thump when the power came back on with possible damage. Some folks built a system with relays that would require a manual reset and this picture looks like they took it a step farther with a possible sequenced turn-on. Or it may be something else completely. Dennis Link to comment Share on other sites More sharing options...
Members jwlussow Posted May 21, 2010 Members Share Posted May 21, 2010 Maybe a pre-amp for the XLR ins? Link to comment Share on other sites More sharing options...
Members Coaster Posted May 21, 2010 Members Share Posted May 21, 2010 what on earth is that tube for? and where are the LEDS to make it lite up seriously - cant figger out why the tube. Link to comment Share on other sites More sharing options...
Members Bassmec Posted May 21, 2010 Members Share Posted May 21, 2010 Thing is what we have here Lads! is an early design of line amp the octal sockets contain what appears to be a rectifier tube and probably a dual triode running in class AB to provide a signal repeater buffer probably with about three watts from a 600 ohm output transformer. Although made of some modern materials This is similar to the circuit used in early aircraft intercoms. Link to comment Share on other sites More sharing options...
Members dennis a Posted May 21, 2010 Members Share Posted May 21, 2010 It looks to me like the components we are looking at are a panel mount relay, an octal socket mount relay (squarish) and a vaccum tube...interconnected with large guage wire. Dennis Link to comment Share on other sites More sharing options...
Members agedhorse Posted May 21, 2010 Members Share Posted May 21, 2010 Thing is what we have here Lads! is an early design of line amp the octal sockets contain what appears to be a rectifier tube and probably a dual triode running in class AB to provide a signal repeater buffer probably with about three watts from a 600 ohm output transformer. Although made of some modern materials This is similar to the circuit used in early aircraft intercoms. That's a bold assumption that is totally off base... and just a casual look at what's on the back of the panel is a total giveaway as to what it's NOT. I suggest that Dennis wins the prize for the most likely analysis of what it is likely to be. Based on the age and the use of XLR(F) connectors for speaker outs, the mil. mult. for signal in, AND looking at the back panel which has an octal socket relay and what looks like a tube appears to be a thermal time delay on relay, and note NO supporting circuitry for any tube stage anything, no HV power supply, it does appear to be a delay turn-on, quick turn-off device and the relay looks like it controls speaker lines though there's no picture detail of the right side of the panel. Anyway, it can't possibly be anything remotely like an amplifier. Sorry. Link to comment Share on other sites More sharing options...
Members samkokajko Posted May 21, 2010 Members Share Posted May 21, 2010 Yeah those XLR are definitely speaker outputs. They have the red/black wires coming from the bananas. And the TS all have the single black cable coming off the multi-core input. Link to comment Share on other sites More sharing options...
CMS Author Craig Vecchione Posted May 21, 2010 CMS Author Share Posted May 21, 2010 I spy a pair of wires coming from the multicore and leading to that control circuit, so it looks as if they were able to remotely turn the circuit on and of from FOH. Link to comment Share on other sites More sharing options...
Members samkokajko Posted May 21, 2010 Members Share Posted May 21, 2010 I spy a pair of wires coming from the multicore and leading to that control circuit, so it looks as if they were able to remotely turn the circuit on and of from FOH. How did they manage that? I only count 12 pins on the multi-core and I see 6 1/4" plugs coming out of it? That would be really cool though. Link to comment Share on other sites More sharing options...
Members Gregidon Posted May 21, 2010 Members Share Posted May 21, 2010 How did they manage that? I only count 12 pins on the multi-core and I see 6 1/4" plugs coming out of it? That would be really cool though. I think you're confused. The remote turn on and off is probably nothing more than shorting two of the pins on the multicore together. This remotely closes the relay which connects the speaker to the amp. Link to comment Share on other sites More sharing options...
Members agedhorse Posted May 21, 2010 Members Share Posted May 21, 2010 I think you're confused. The remote turn on and off is probably nothing more than shorting two of the pins on the multicore together. This remotely closes the relay which connects the speaker to the amp. Closes a relay or closes the heater control circuit on the time delay relay that then closes after a set time to close the power relay or the speaker line relay (whichever way they chose to do it.) Link to comment Share on other sites More sharing options...
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