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  1. nakdoc

    Tandberg 3014A Cassette Deck

    Canada is a small country, I thought everyone knew everyone! Now you have to get the deck to him without damaging the flywheels. Put it in a box and strap it to a pallet?
  2. nakdoc

    A 700-Watt Amplifier Design, by Robert Carver

    Carver is making the case here for high power amps. At the time, 60 watt amps were all anybody needed! He is demonstrating that peak clipping does happen, and worse, clipping protection circuits can make nasty sounds. I believe there exists a more widely available Carver tome about "Why 350...
  3. nakdoc

    How do we determine resonant frequency of objects for less than the cost of a Big Mac?

    I'm trying to remember how that was tested in the old days. You could play a sweep record and look for peaks, but I believe the method was to set the stylus on a piezo transducer and induce the sweep that way. The method I would think most effective is to thump on the turntable base while the...
  4. nakdoc

    Anyone In The Dayton Area?

    I shopped at mendelsons once back in the '70s. It was a huge surplus store that derived inventory form NCR in Dayton, and Air Force surplus from Wright Patterson. I do not recall much about the inventory except that it was not audio related. I'm sure most of the worthwhile parts will end up at...
  5. nakdoc

    A 700-Watt Amplifier Design, by Robert Carver

    Amplifier #1 is the Dynaco Stereo 120.
  6. nakdoc

    Pile of Tubes found at old closed shop. Any Interest?

    Sam, don't spend the time posting all the tube numbers. From you rpost last week, I'd say this is a typical tv shop assortment with some console and table radio tubes.
  7. nakdoc

    Pile of Tubes found at old closed shop. Any Interest?

    6D10 is the only Compactron type tube that is worth keeping. All the audio tubes and rectifiers are worth something if not big money. if most of the tubes are TV related stuff like 25L6 can be sold. Just a bout any 2 number antique tube (#45) and 4 number tube is worth something.
  8. nakdoc

    Amp heats up

    Turntables are the worst! On analog tuners, if you get a bunch of static when you tune, spray one of the bearings towards the dial string with deoxit. Keep it away from the last two bearings, or you will launch the dial out into space.
  9. nakdoc

    A Tape Surprise

    Tape is for losers.....unless loosing is everything, then I want tape too! Sometimes I set decks up for D and it isn't much different from the ancient UD-XLI in my stash of calibration tapes. I am so highly biased that I can't bring myself to use Sony tape anymore (their labels came off in...
  10. nakdoc

    Amp heats up

    Made the number up assuming it was for PA use. If 25 mV is running cool then for home use I would use that for both channels. Your amp isn't old enough, but for stuff made in the '60s, we are spraying the bias pots with Deoxit. You will find random changes in bias are common when they oxidize.
  11. nakdoc

    Amp heats up

    Measure across one of the .15 ohm 3 watt emitter resistors. Set bias for 15mV. Measure it before you adjust. If the bias seems normal, the heating can be a dangerous high frequency oscillation. Check R49 and R50 for burns.
  12. nakdoc

    Turntable Mats

    I don't hear "bright" when I listen to records on glass. It seems to increase dynamics (which I value highly) and I hate felt mats. try it an see what you think. Too many people will put a felt mat on top of another mat lowering the VTA. I guess if no mat raises the VTA, the record could get a...
  13. nakdoc

    Turntable Mats

    Anyone try playing a record on a glass platter with just a weight or clamp? I like my standard SOTA soft mat, understand, but glass does something interesting to the record.
  14. nakdoc

    Wall of Flame

    You got watts to lend!
  15. nakdoc

    What cartridge are you using?

    Bob, Those Signet speakers also had an Audio Technica clone, and they are really great speakers. If any of you guys are tempted to upgrade, I have used AT440 ML and used Shure V-15III, used AT shibata p-mount, and a genuine new AT14 stylus and used body all for sale.
  16. nakdoc

    25$ worth record clamp

    I have a used SOTA Star Sapphire vacuum table with an ET II arm with pumps and reservoir for sale. Only $2.5k but we are considering offers. Local pickup only. Comes with lessons. I can't think of any other vacuum tables. I also have a friction style clamp for turntables with suspensions.
  17. nakdoc

    Always good to know...

    Good stuff Steven. I'm trying to talk some friends into a cave trip. Being underground covered in mud is beyond social distancing.
  18. nakdoc

    Gasoline prices Skyrocketing!

    Tapes got one President into a lot of trouble!
  19. nakdoc

    Thanks Steven For The Tapes

    International transport of cassettes is prohibited by the current Covid-19 orders.
  20. nakdoc

    I have a VCR repair to attempt, what is it I'm looking for and?

    use your imagination to locate the exact center of a cassette when it is loaded and ready to play. This is where the idler and tire are found. You should be able to pop it out without removing the loading mechanism. I saw a gas station with a sign: Stay in your car. We'll pump the gas. full...
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