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Oh, and the tape guide is dead centre with the tape. This job was a little awkward when returning the guide assembly back, and that - you have to leave the cassette loading/holding tray off while the supply guide is centred. It's common sense, experience with trial and error etc.

The rollers arrived today, bought from FixYourAudio. Sorry to hog the OP's post, but it's worth a ganda if you have a similar deck. I took the old supply pinch roller out; the 2mm pin will tap out and was/is held by frictional fit. Maybe I ought to put a spot of glue on the pin-casing just to...

I prefer it when RMS power is quoted into a resistive load, at least there I know where I am.

Just me mumbling on this topic: I have looked at these Chinese gauges (and their 'ABEX' tapes) , and continued to look, and look, and look ...... A waste of money? Maybe, some are very cheap, I think I've seen some at 'just' £30 Sterling, but what am I getting for that kind of money? And how...

May be only during a transient? Much like a diode can withstand many amperes of current for a millisecond or less. More commercial BS I'm afraid.

Luckily, I haven't had a problem similar to yours at that frontside, just different ones elsewhere. I have pinch rollers in the post, so when I get that supply capstan-pinch side done, I'll let you know as these transports appear to be near identical.

Back Tension: Make sure the pad is clean; 'sticky' or inconsistent back tension can worsen wow/flutter especially at the end of the tape. Although I am speaking from experience with a single capstan machine - the Sony TC-206SD. @mr_rye89: I'm sure you've seen this, but thought I'd upload it...

Images .... hopefully.

Of interest to mr_rye89, the pinch roller sizes if you need new ones: Supply = 11mm x 8mm x 2mm, Take-up = 13mm x 8mm x 2mm. I went looking for any pinch rollers I had in stock and found that I have two that would fit the Take-up side; a 13x8x2, and a 'chancy' 13.5x8x2. So the little devil in...

What do I like about cassettes and R2R in general? I like that we are somewhat in touch with both mechanical and electrical/electronic engineering - a digital device is just a rectangular block that very few understand what's happening internally. There's a process of learning associated with...

Previously, I've been through all the back tension settings to combat the original tape creasing problem. I even added some extra back tension above the max setting - that did the trick, but it is not the answer. The problem is very probably that either one or both pinch rollers are not exerting...

The Phase Linear deck I'm working on has two felt clutches. One clutch for fast F+R, and another clutch for play. I can already see that I'll have potential issues with tape tension if the felt or springs are out of spec. I've been working on an AKAI GXC-710D...

I see the brass drive stub contacting the tire. Is there not a felt disc clutch with a spring somewhere in the mechanism that would permit proper tension and slippage? No, not that I can see, and it's the same (from memory) on the TC-K61. The slippage between brass driver pulley and idler tyre...

Jim, perhaps I may not have been clear enough, but the 'wetting' (more like dampening) of the rubber idler (via Q-tip) is that very rubber idler in the top right hand corner. In PLAY mode shown here, the brass driver is driving (and part slipping with) the idler, but now there is less friction...

There' something I forgot to mention earlier concerning tape creasing, and it is this - the take-up reel tension is high, too high in my opinion. I have cleaned the said idler many times but the traction remains excessive. So yes, a new idler tyre is needed, but late this afternoon, I thought...

Thanks for the replies. And apologies if I am distracting attention away from the original post, but it is relevant. The additional back tension is very small, but while it fixes the 'SONY HF' problem, increasing back tension isn't the solution. Of interest - I have noticed with this...

I think they are identical. Once you've got it all back together, test with some 'disposable' tapes as dual capstan systems when they go wrong may crease/chew the tapes!? Mine may still crease one particular tape (SONY HF) when it's feeling moody. I believe I know the source of the problem - I...

No worries, no bull**** here. ;o) https://cassettedeckman.blogspot.com/2024/05/sony-tc-k75-cassette-deck.html

From memory, I bought some bearings some time ago, 1.5mm, 2mm, and 2.5mm diameter. As George S suggests, my money will be on that it is either a 2mm or 2.5mm bearing. Luckily, I've not had to open up my TC-K75 at that part of the transport. This aside, and I guess your TC-K71 is similar?, I'm...

I have a similar Sony TC-K75 which I rescued from dead. Those blue plastic parts do crack, I had to Gorilla Glue the rear motor and flywheel plate supports. This repair game isn't for the impatient! ;o) Not wishing to distract others, but if you permit, I'll put a link in to my blogger page...