Uher deck repairs
A friend of mine has recently acquired a brand new Uher professional tape deck. I have not had a chance to look at it, but according to him it has the following problem: (snip) I tried various cassettes from my library and they all seem about 20% faster. So, I tried to record a A440 oscillator tone and used an electronic tuner to watch what it was doing. It played back but the speed slightly was changing throughout. I didn't measure voltage, just pitch. Now, there is a yellow LED that says 'variable' which I'm assuming has something to do with either servo or motor speed. When rewinding, the lamp stays lit - but upon record or PB it was flickering at different rates. As I have no manual, I'm not certain what the LED is for and the U.S. Uher fixer wouldn't even answer my question. (His reply: "Send it in, we'll fix it".) Wouldn't even tell me *what* the yellow LED indicates!!!! (Asshole!) My suspicion is this was a European model and it's getting it's motor speed from line voltage. Of course, the 50 HZ / 60 HZ make sense right? If it's a import, regardless of the voltage - which I know is correct - would the motor need to be changed if the unit was originally intended to be run at 50 hz? That's my question. Just give me your thoughts, a guess or a stab in the dark. If you search Uher repairs - everything is in Kraut. The guy at SMC / Nixontapes he calls himself - is the only guy I could find.(snip) Anyone have any ideas? And if it is truly a unit that requires 50hz, is there a power supply conversion that can be done. I remember back in the 80s there were a ton of kits that would allow 12volt clock kits to be used in cars, by supplying a 60 hz source into the dc supply. -- Kim..."A Man Of True Frankenstinean Proportions" -- Kim..."A Man Of True Frankenstinean Proportions" |
To convert the line frequency for your tape deck motor, requires a lot more
power than what these old clock kits can provide. The conversion is very expensive, and it would be best know if the motors, or a pulley, or some other parts can be changed in the tape deck to make it work at the proper speed. I would think that if the tape deck is a high quality one, it uses a servo lock system that is independent from the AC mains frequency. I used to see the AC mains frequency used in the lower cost home type audio equipment many years ago. Your tape deck probably has a servo lock problem. This can be a bit involved to service. It would be difficult without the service manual, and any proprietary parts on hand, if the problem is more than a simple connection. Normally these tape decks are very good when they work properly. The servo lock should be very accurate. -- Jerry G. ===== "Kim Sleep" wrote in message . .. A friend of mine has recently acquired a brand new Uher professional tape deck. I have not had a chance to look at it, but according to him it has the following problem: (snip) I tried various cassettes from my library and they all seem about 20% faster. So, I tried to record a A440 oscillator tone and used an electronic tuner to watch what it was doing. It played back but the speed slightly was changing throughout. I didn't measure voltage, just pitch. Now, there is a yellow LED that says 'variable' which I'm assuming has something to do with either servo or motor speed. When rewinding, the lamp stays lit - but upon record or PB it was flickering at different rates. As I have no manual, I'm not certain what the LED is for and the U.S. Uher fixer wouldn't even answer my question. (His reply: "Send it in, we'll fix it".) Wouldn't even tell me *what* the yellow LED indicates!!!! (Asshole!) My suspicion is this was a European model and it's getting it's motor speed from line voltage. Of course, the 50 HZ / 60 HZ make sense right? If it's a import, regardless of the voltage - which I know is correct - would the motor need to be changed if the unit was originally intended to be run at 50 hz? That's my question. Just give me your thoughts, a guess or a stab in the dark. If you search Uher repairs - everything is in Kraut. The guy at SMC / Nixontapes he calls himself - is the only guy I could find.(snip) Anyone have any ideas? And if it is truly a unit that requires 50hz, is there a power supply conversion that can be done. I remember back in the 80s there were a ton of kits that would allow 12volt clock kits to be used in cars, by supplying a 60 hz source into the dc supply. -- Kim..."A Man Of True Frankenstinean Proportions" -- Kim..."A Man Of True Frankenstinean Proportions" |
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