Import charges previously quoted are subject to change if you increase you maximum bid amount.By clicking Confirm, you are committing to buy this item from the seller if you are the winning bidder and have read and agree to the Global Shipping Program terms and conditions - opens in a new window or tab.The device was made bigger, in order to enable it to take tape reels up to 26.5 cm (10.5") as well.For the first time, a synchronous motor was used to drive the reels, which guaranteed the absolute speed, within very tight tolerances.My guess is that one of tantalum capacitors has gone bad. Michael (UK) Report Post Reply With Quote Multi-Quote This Message Quick reply to this message Old Yesterday, PM #13 Nanaimo is offline Nanaimo United Kingdom diy Audio Member Join Date: Oct 2014 Default Revox A77 hum.A77 has dual mono sound topology and is modular, so it is fairly easy to play with, provided that you have knowledge and experience in electronics. NAB 1/4" is still available - but where it used to be 12 is now 45. Quote: Originally Posted by Willi Studer View Post This could be a faulty or dirty potentiometer or switch.* Estimated delivery dates- opens in a new window or tab include seller's handling time, origin ZIP Code, destination ZIP Code and time of acceptance and will depend on shipping service selected and receipt of cleared payment- opens in a new window or tab.Delivery times may vary, especially during peak periods.
My guess is that one of tantalum capacitors has gone bad. Moving on, try to eliminate/replicate the problem by playing with front panel switches and note the switch/position when there is no noise.) So far I have the case off, a couple of long banana plugs stuffed in the two holes, and am gazing at the amazing rigid lattice construction within - compared to my AKAI GX-635D in which I just replaced all the transistors and electrolytics of the pre-amps. My DMM is one of the new UNI-T UT61E's Michael (UK) Report Post Reply With Quote Multi-Quote This Message Quick reply to this message Unread Yesterday, PM #14 Willi Studer is offline Willi Studer Serbia diy Audio Member Join Date: Jan 2008 I hope the topic starter does not mind that we hijacked the thread, otherwise Nanaimo can start a new one. This is important because there are some differences in electronics and I can provide you with the corresponding service manual. Describe better the noise you get and when do you get it: is it only in reproduction or also when you select input instead of NAB/IEC and the deck is in stop position? In addition, cleaning the boards before spraying is the way to do. Release PLAY Hum returns in two stages b)Settings: MONITOR = CHII = No Humm Press PLAY = low Humm c)Settings: MONITOR = CHI, INPUT at 'INPUT' = no Humm, but at full Volume: heavy 'Hissss' 3. You can download the service manual from the following link: HJ This is a public domain document so it is free to share.The 'Service and Maintenance Manual' doesn't go into enough detail to guide me as to how to remove the Cct boards - or even which of the seven small Cct. Yes, tantalums are available but my advice is to replace them with good electrolytics for better reliability. If unsure, look at pictures on Google and see how to determine the model from the front fascia design. Describe better the noise you get and when do you get it: is it only in reproduction or also when you select input instead of NAB/IEC and the deck is in stop position? From your description, I suspect you have a faulty playback amp.Through the use of a solid die-cast bridge, the new capstan motor together with the clamping arm and recording head block formed a very stable unit.Finally, during the lifetime of the G36, a non-contact photoelectric tape end switch was used for the first time.I took my A77 to Dave Rogers in Southport and he replaced the blown cap and its resistor on the motor control board..for a tenner, and within the hour ! At least the sound pcbs are easily accessible but I can't see anything on a visual inspection. I also replaced most of the calibration trim pots which were knackered.