sweetbeats's latest activity
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sweetbeats replied to the thread Tascam 34 - meters doing strange things.Yes they are all mounted to the Power Supply PCB. And it depends on the caps. There are computer grade screw-terminal caps in my Ampex... -
sweetbeats reacted to frnkfrkl's post in the thread Tascam 34 - meters doing strange things with
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Sorry, one last thing. The machine had been in storage since about 1999. I had loaned it to a friend and have no idea where it was... -
Discrete voltage regulator circuits vary a bit but most of them use a series power device and there must be a voltage reference...
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sweetbeats replied to the thread Tascam 34 - meters doing strange things.Okay. Yeah something is not right for sure if both sides are running around 6V. That’s with J171 unplugged from the motherboard? Yes...
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sweetbeats replied to the thread Tascam 34 - meters doing strange things.“Yeah, 6V.” 6V where? I keep repeating the question…between pins 9&11 or 10&11 of J171? Or both? Caps and diodes don’t regulate the...
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sweetbeats replied to the thread Tascam 34 - meters doing strange things.6V where? Between pins 9&11 or pins 10&11, or both? Is it still 6V? The audio chain will function at 6V, but that doesn’t mean it’s...
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sweetbeats replied to the thread Tascam 38 R+P Card Potentiometer Problems.I read the manual. So the tip temp is fixed at about 900 degrees. That’s too hot IMO. So, again, if you’re going to continue using that...
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sweetbeats replied to the thread Tascam 34 - meters doing strange things.Look at page 82 of the service manual linked above…that’s exploded view 4. Looks like the power supply PCB is horizontally mounted below...
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sweetbeats replied to the thread Tascam 34 - meters doing strange things.Um, no? 106 pages? Full service instructions, theory of operation, exploded views, PCB layouts, schematics…it’s the full operation and...
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sweetbeats replied to the thread Tascam 38 R+P Card Potentiometer Problems.Thanks. Not trying to be a downer. What model Weller station? I generally like using something that runs at about 700 degrees. It...
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sweetbeats replied to the thread Tascam 38 R+P Card Potentiometer Problems.Those trimmers will out-last any other potentiometer on that machine. They are not the problem. I recommend you find some scrap PCBs...
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sweetbeats replied to the thread Ampex 440C 1" 8trk Capstan motor.Okay. I got confused because a couple posts ago you said “I especially liked the 1/4" 2trk B for live stereo. From memory I think the...
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sweetbeats replied to the thread Tascam 38 R+P Card Potentiometer Problems.The motherboard of the 30 series is known to have mechanical failures of the solder joints, and I understand it can be beneficial to...
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sweetbeats replied to the thread Tascam 34 - meters doing strange things.You have a 34 or a 34B? The 34B service manual is available online for free in pdf format...
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sweetbeats replied to the thread Ampex 440C 1" 8trk Capstan motor.Track width or head gap? You’ve referenced both. What are we talking about? Ampex adhered to the NAB standards for track widths in each...