Re: LA-2A compressor - Pultec and 1176 schems

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4/29/2000 4:57 PM

Trace

Re: LA-2A compressor - Pultec and 1176 schems quote: "Trace I just recieved a broken 1176(mine to keep) Is this a good unit? looks very well made. However I don't like transistor sockets would I hurt its value If I soldered the transistors in? "     Well, in theory "yes" it would hurt it's value. Recording engineers are WAYYYYY anal about things like that! (ha, ha) I would say leave it as is if it were me.     I personally like those compressors. Who gave it to you?   Ohhhh...the other thing is that the bottom is dropping out of the market on the 1176's and LA-2A's because they were reissued and sound pretty amazing.     Trace

 

4/29/2000 9:02 PM

Rick Erickson

quote: "Well, in theory "yes" it would hurt it's value. Recording engineers are WAYYYYY anal about things like that! (ha, ha)"     I don't know about their transistor sockets but UREI used some terrible IC sockets in their EQ's, X-Overs and other devices. I replace them with newer low-profile sockets whenever I find them. The original sockets are rather tall and don't have much of a grip on the IC pins. Many intermittent problems have been solved by replacing them.   RE

 

4/30/2000 1:39 AM
Gus	Thanks!!!!

 

4/30/2000 3:38 AM

SpeedRacer

On the topic..   check out Eddie Ciletti's page (on my links page) for a great "how they work" article specifically on the LA-2a and sim circuits (tube & SS). There are a couple links with schems for them as well as parts sources to DIY one of these. The RI is over $3k, if I read the webpage right.. (ouch!)     ps: you can get the LA2a schem for free on other sites (email me if you have trouble and I'll do the heavy lifting.

 

5/1/2000 3:46 AM
Carlo	here's the link for Joe's (aka Speedracer) page.   http://www.obsoleteelectronics.com/     and the link for Eddie Ciletti's page...   http://www.tangible-technology.com/     and the link for Jensen transformers which has some nice application notes and schematics -   http://www.jensen-transformers.com/     Carlo

 

5/8/2000 2:53 AM
eric	does anyone know the relationship of the T4B to the circuit? I would love to know what it is so that i dont have to pay the 150$ just for that part i mean it should only cost about 5 bucks to make if you do it right? Any help would be appreciated

 

5/8/2000 5:37 PM

SpeedRacer

The opto coupler *IS* the circuit.. well, that's an eggageration, but it's key to how well the thing works and there is no known substitute part. Keep in mind that the real (and RI) units go for $3,000 or thereabouts, and $160 looks cheap. I think you could build one of these for under $600, incl Jensen trannies etc. (It's on my "to do" list!!)   Read the article "how they work" on Eddie's page. (link on Carlo's reply)

 

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