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Type: Posts; User: xoaphexox

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  1. Replies
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    Very clean pair of 1.2TL's. I hope he gets it -...

    Very clean pair of 1.2TL's. I hope he gets it - it's a lot of money but not outside the realm of reason for someone with the disposable income and a burning desire for the king of SDA...
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    Your Nak PA-7's will sound fantastic on the SRS....

    Your Nak PA-7's will sound fantastic on the SRS. Your biamped 555's would sound great too. You'd be hard pressed to find something worth the time and effort to sell them and stay within your $2k...
  3. Thread: Dayton Caps

    by xoaphexox
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    3,564

    Since you already got the Daytons, try them out....

    Since you already got the Daytons, try them out. I like Dayton. If you do too you can consider the job complete and use your money for other things. If you don't like them, spend as much as you...
  4. If the 555 is in good health I'd say you have...

    If the 555 is in good health I'd say you have nothing to worry about.
  5. Need Help This forum recently helped steer me towards...

    This forum recently helped steer me towards upgrading from a Pioneer SPEC-4 to an Adcom GFA-5802 and I couldn't be happier. I highly recommend it.

    Other suggestions were Sunfire 300x2, Parasound...
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    Thanks, so if the power resistors are .33 ohms...

    Thanks, so if the power resistors are .33 ohms and I want 100mA, I should dial in the bias at 33mV...

    .100 (I) = .033 (V) / .33 (R)
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    Thanks, this is a quote from Nelson Pass on this...

    Thanks, this is a quote from Nelson Pass on this topic but I am not knowledgeable enough to fully comprehend it. I am used to being told point blank by a service manual - so the "see where it goes"...
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    Does anyone have the biasing procedure for the...

    Does anyone have the biasing procedure for the GFA-5802? I know the location of the pots and have the tools - I would to know what value to bias this amp at and where the best place to take the...
  9. Replies
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    The new input board is in and 0mV offset dialed....

    The new input board is in and 0mV offset dialed. This thing sounds amazing. No regrets with the purchase. I will be selling my old power amp because this one is here to stay! Thanks for the...
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    Well the new zener did not fix the problem. At...

    Well the new zener did not fix the problem. At least one of the hand matched FETs are blown as well, so instead of buying a bunch of them and gain matching them myself I decided to just buy a NOS...
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    It looks like he greased the whole cab with baby...

    It looks like he greased the whole cab with baby oil or something...
  12. Replies
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    I am going to bow out of this now that I...

    I am going to bow out of this now that I understand it requires some level of DIY. Thanks for the opportunity.
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    Thanks FTGV, downloaded it and that's what helped...

    Thanks FTGV, downloaded it and that's what helped me figure out the zener I need to replace. I took resistance measurements of the surrounding parts and they were the same between boards so I'm...
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    The good news is that I think I just figured out...

    The good news is that I think I just figured out what the issue is. I swapped the input boards between channels and the DC offset issue switched channels as well, so now I know the issue is in the...
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    5,219

    Unfortunately one channel has an offset of 150mV...

    Unfortunately one channel has an offset of 150mV and cannot be changed via the pot. The other channel was -5mV and was easily dialed down to 0mV.

    So, I assume this amp has a fault in the one...
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    Hey, that's great news! I will definitely check...

    Hey, that's great news! I will definitely check it out! I would have thought this was one of those 'fancy' self adjusting amps because I only saw one set of pots on the circuit boards - turns out I...
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    I know this is an old thread but I was in a...

    I know this is an old thread but I was in a similar situation recently- I purchased a GFA-5802 for my 1.2tl speakers. I tied the negatives together with a piece of monster cable and two banana plugs....
  18. Sorry to ask again - is this a "turnkey"...

    Sorry to ask again - is this a "turnkey" isolation transformer replacement or will this also involve assembly and sourcing of other parts?
  19. Replies
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    Sticky: Wow!!

    Wow!!
  20. I may be interested - do you have any pics of the...

    I may be interested - do you have any pics of the finished unit? Is this plug and play or does this involve more DIY work? I'm late to the party...
  21. Replies
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    Fantastic, I have it playing now this way and it...

    Fantastic, I have it playing now this way and it sounds great indeed. I was going to bi-wire but I think I will leave well enough alone for now. Maybe I'll try it after a while of having things set...
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    Okay, so if I was not planning to bi-wire, would...

    Okay, so if I was not planning to bi-wire, would this be an acceptible way to strap the negatives so that I can use them with my SDA-SRS 1.2tl? I think it is, but I really want to measure twice and...
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    I think you're on to something - they are...

    I think you're on to something - they are currently at 122 and 119 degrees now. I presume this may be one of the reasons that amplifier manuals tell you to turn on the unit about 30 minutes prior to...
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    Thanks for the input! Now I just need to find...

    Thanks for the input! Now I just need to find that service manual. I am comfortable setting the bias as long as I have a trustworthy service manual in hand. I've worked on many vintage amps in the...
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    Using an infrared thermometer, one channel is 112...

    Using an infrared thermometer, one channel is 112 deg F about 5 minutes after turn-on. The other channel is 101 deg F - is that enough of a disparity to be cause for concern?

    Thanks much - I like...
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