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  1. dhnash

    Akai gx270D headphone jack

    As is also the Akai GX-630D
  2. dhnash

    Scotch 207- No leaders?

    I think this was just a comment that your post #16 in response to post #15 which was made on Dec 27, 2011 revived a discussion that was considered "dead".
  3. dhnash

    Sony RT-33 power switch replacement

    To summarize what dankik dr*audio have said, if you use the SMK TV-3 JP27 you should connect the AC "hot" wire to the normally open (NO) terminal (the one on the opposite end from the button) and the wire that connects to the internal circuits of the unit to the common (C) terminal (the one in...
  4. dhnash

    Sony RT-33 power switch replacement

    The switch is single pole, double throw (SPDT) type, so it has common (C), normally open (NO) and normally closed (NC) terminals. When used as a power switch, the common and normally open terminals would typically be used for controlling power delivery. The switch that dankik posted is single...
  5. dhnash

    Denon dr-m44hx Pinch Roller

    If you can measure the dimensions of the pinch roller, you may be able to find a suitable replacement for it here. https://fixyouraudio.com/
  6. dhnash

    Pioneer std-334 and std-331 test tapes

    Other possible sources of cassette calibration tapes are discussed in this thread. https://www.tapeheads.net/threads/buying-test-cassettes-in-the-eu.103385/
  7. dhnash

    Pioneer std-334 and std-331 test tapes

    Here is one source: https://www.gennlab.com/pioneer_cass.html
  8. dhnash

    Sony DTC-55ES DAT strange issue

    You may want to repost this question in the following sub-forum that focuses on DAT equipment or the forum moderator may be able to move your post to that sub-forum. https://audiokarma.org/forums/index.php?threads/servicing-a-sony-dat-machine-pictorial.184212/
  9. dhnash

    who's recording a cassette tape?

    That was a great album!
  10. dhnash

    AIWA AD-F350

    The service manual shows that leaf switches S904 and S905 are used to detect whether tapes of type other than ferric are installed in the cassette bay. They do this by detecting the presence or absence of notches on the top side of the cassette.
  11. dhnash

    Pioneer rt-909 blowing main fuse

    If the reel motors did not operate properly when the capstan motor was running after you helped it to start or when the capstan motor was not operating, it seems unlikely that their operation is dependent on feedback from capstan motor drive circuit. The reel motor drive circuit description...
  12. dhnash

    Reel to Reel Struggling with Heavy Tape?

    According to the schematic I found (see below), there is no speed adjustment on this unit since it uses an AC synchronous motor the speed of which is based on the AC line frequency. A loose belt would not make the tape run fast. It is possible that the high speed playback that you are...
  13. dhnash

    Can't record on some tapes

    This website illustrates what KingBubba is talking about. https://psap.library.illinois.edu/collection-id-guide/recordprotection
  14. dhnash

    Pioneer rt-909 blowing main fuse

    The carbon contacts on the brushes of the capstan motor are missing or in very poor condition. You will need to source a replacement motor.
  15. dhnash

    Pioneer rt-909 blowing main fuse

    Your photos are not well focused and are not close enough to see some of the things you described. I believe the rubber strips attached to the brushes serve as dampers that help maintain good contact between the brushes and the armature commutator. Better photos would help to see what the...
  16. dhnash

    Pioneer rt-909 blowing main fuse

    It seems the section of the circuit that controls the direction of rotation of the capstan motor is not operating properly. In the schematic below, transistors Q208-Q213, controlled by logic further upstream, are used for this purpose. I would suggest that you read through the circuit...
  17. dhnash

    Can someone explain to me what "Tape Saturation" or "Tape distortion" is? Example?

    There are hardware devices such as the dynamic range expanders which were made by dbx that might allow you to "fix" the problem. These devices were designed to be placed in the audio playback chain and can be adjusted to provide the level of expansion that you find appropriate. There are also...
  18. dhnash

    Kenwood kx-620 does not record left channel. Help.

    Is this a problem that developed recently and the deck was previously able to record properly?
  19. dhnash

    Onkyo TA-2027

    Try downloading the service manual from here: https://www.manualslib.com/manual/696748/Onkyo-Ta-2047.html
  20. dhnash

    Care and Maintenance of Cassette and Reel to Reel.

    It's good that in your experience IPA has proven effective in removing oxide deposits. I also find that with frequent cleaning, 99% IPA is able to remove any deposits that adhere to the tape heads and guides on my equipment. Unfortunately that is not always the case and acetone has been used...
  21. dhnash

    Revox g36 speaker specs

    This thread indicates that a 4 ohm speaker would be a better match but an 8 ohm speaker would be OK. https://antiqueradios.com/forums/viewtopic.php?f=6&t=299587
  22. dhnash

    Revox g36 speaker specs

    The service manual for the Revox G36 indicates it has a loudspeaker output rated at 5 ohms, 6 watts.
  23. dhnash

    Care and Maintenance of Cassette and Reel to Reel.

    I can't help you since I haven't used or investigated the composition of either of the products you mentioned.
  24. dhnash

    Care and Maintenance of Cassette and Reel to Reel.

    That is a difficult question to answer without knowing the composition of each of the two cleaning kits. If you are able to find an SDS (Safety Data Sheet) for each product, that would help. The components being cleaned are very similar, so I would say that the cleaning products intended to...
  25. dhnash

    Care and Maintenance of Cassette and Reel to Reel.

    https://en.wikipedia.org/wiki/Denatured_alcohol
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