Recent content by raindog1975
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AKG K77 mod
Hello 13 cats, Just peel off very gently the ear-pads ( they are glued to the baffle ) , and you will find 5 screws under a layer of "sticky stuff" ( glue ) . I suggest protecting the glue from dust and re-assembling the headphones only after all the modifications are complete ( I also...- raindog1975
- Post #5
- Forum: DIY (Do-It-Yourself) Discussions
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Spray painting help
First you need to spray a primer ( after a thorough degrease of the parts - with alcohol - ). Look for a primer specifically made for plastics or at least an "universal" one. In my experience chrome paint ( the procedure you mentioned in correct , by the way ) should only be applied in a...- raindog1975
- Post #2
- Forum: DIY (Do-It-Yourself) Discussions
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LM386 Balanced Amp
After some "googling" I came to the conclusion that balanced amps are used only in high frequency applications ( microwave band ) , the only thing similar, as far as audio signals are concerned, is the impedance balanced line used for connecting microphones to preamps or mixers or connecting...- raindog1975
- Post #5
- Forum: DIY (Do-It-Yourself) Discussions
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LM386 Balanced Amp
What exactly do you mean by "balanced amplifier"? LM386 is not an opamp , it's a power amp and it is pretty much limited to what you can find in the data sheet ( a notable variation being the headbanger amp ).- raindog1975
- Post #3
- Forum: DIY (Do-It-Yourself) Discussions
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potentiometer resistance and source load ? (cmoy)
Since you use the cmoy with a source that can drive ( poorly ) 32 ohm headphones it's possible to use even lower values for the pot ( like 1k or 4.7k ) , values higher than 10k are useful only if the source requires it . Commercial amps usually have an input impedance of around 50k because it's...- raindog1975
- Post #7
- Forum: DIY (Do-It-Yourself) Discussions
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Vintage amp; left channel not working.. help?
Most likely dried-up electrolytic capacitors ( given the age of the amp and the symptoms ). It would be a good idea to change all of them ( most electrolytic caps don't last more then 10-20 years ) , it's a pretty big job but well worth-it ( I did it with my Sanyo DCA20 and I could't be happier...- raindog1975
- Post #4
- Forum: DIY (Do-It-Yourself) Discussions
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Heavy Metal Headphone Stand
Nice work! It will probably last longer than any headphones you will ever own .- raindog1975
- Post #7
- Forum: DIY (Do-It-Yourself) Discussions
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Post pics of your builds....
Finished yesterday : cmoy in a old PC ( Siemens ) PSU "improved" with wooden face and sides ( stained and oiled ) . Inside standard cmoy ( 6 gain , 10k pot , 0.47uF Wima input caps, +/- 12 volts stabilized power supply ) ; for now it has a njm(jrc)4556 but it's socketed and I ordered...- raindog1975
- Post #7,821
- Forum: DIY (Do-It-Yourself) Discussions
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Show us your vintage headphones!
As vintage as they get: circa 1940's 2000ohm ( each ) headphones - made in France , it says Pival on the headband(s) . Got them at the flea-market , cleaned them , re-cabled ( I kept the original plug ) I still use them on my crystal radios .- raindog1975
- Post #156
- Forum: Headphones (full-size)
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Custom Creative Aurvana Live! - Disassembly, Painting and (possibly) Recabling
1) No idea , just remove all the screws ( if any ) and make sure you don't force anything . 2) Try a paint stripper ( look for one that can be used on plastic ) and if sanding is necessary use 600 grit minimum ( any coarser and it will leave deep grooves in the plastic ) and finish with 1200...- raindog1975
- Post #2
- Forum: DIY (Do-It-Yourself) Discussions
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THE DIY HEADPHONE STAND THREAD
Nice work woodzwork , you may want to make a "conventional" one too ( you seem to have the necessary skills ) just in case you re-arrange the furniture .- raindog1975
- Post #760
- Forum: DIY (Do-It-Yourself) Discussions
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Can DIY be Audiophile?
If you use good quality components ( including wires, switches, power supply etc. ) on a well designed PCB and a good enclosure ( preferably steel or at least aluminum for EMI shielding ) you can even outclass commercial HI-FI equipment ( don't take my word for it , go to www.diyaudio.com and...- raindog1975
- Post #2
- Forum: DIY (Do-It-Yourself) Discussions
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Sennheiser and AKG using the same drivers?
Nice find tdockweiler . From my experience in speakers building I know that the type and quality of an speaker enclosure is as important as the driver ( a good quality speaker in poorly designed an/or build enclosure will sound bad most of the times ), so even if the drivers are almost...- raindog1975
- Post #21
- Forum: Headphones (full-size)
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Strange issue with receiver?
Since the receiver works ok with spdif it means the power amps are ok but you might have a problem with the analogue input stages ( a preamp after the source selector or a muting circuit ). -
Post pics of your builds....
Nope , it's a "headbanger" = 2 x LM386N ( not quite as good as a cmoy but with some care in the construction it comes close ). I had a cmoy but I gave it to a good friend for his birthday a few weeks ago and I'll probably build another one soon , but first I want to do a Grado RA1 clone.- raindog1975
- Post #7,805
- Forum: DIY (Do-It-Yourself) Discussions