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yes, you do remember right! there is a couple of 2.2uF polarized capacitors put in anti-series on each channel of the PB amp, just before the PB bias traps. But, one of the modifies suggested by Alex was to replace these couples of 2.2uF polarized capacitors put in anti-series with one 1uF non...

wanna win the easy way? :P of course, ANT-modded RS-B965 is also my favourite deck, with the "MF" version even more. :) be careful with the CT-F1250... those ferrite heads can be a problem which is impossible to fix. several years ago, I had almost bought one but, luckily, I didn't. ;)

Well, after experimenting some more modifies, which I guessed they were THE way to raise maximum bias current, it seems they are not... but, on the contrary, even if i gained quite some available range at the bias trimpots (they give me the previous max bias levels when they are tuned half way...

well, it might need some more time because, just this evening, i've finally found how to boost maximum bias current the deck could deliver... something i was hoping to find for quite some time. These AX heads, in general, need more bias than original ones and my internal bias trimmers were just...

one thing to do next... making a thread here about this modified AIWA, documenting all the modifies I've applied on it. at first, this deck had its own original permalloy "DX" heads and the usual modifies by Alex/A.N.T. and his more recent modify regarding the REC EQ on normal position. On top...

This one! :D Finally, this AIWA AD-F880-MAX (MAX stands for Modified and AX heads) is ready... spent the evening checking frequency responses and MOL on a few tapes, to make sure the "AX" amorphous heads transplant went fine and I must say I am really satisfied... it plays better and it records...

actually, the point I use adhesive copper tape isn't because i need them being sticky. but when I must make a shim of a thickness which needs more layers of such copper tape, i stick the layers against each other and the final result is a non sticky shim.

Really? :oops: Be careful... it's dangerous stuff! :p Well, not really... or, at least, not this specific album which is maybe their most easy to digest, even if I never really investigated the lyrics then I cannot assure you that the lyrics are exactly "safe". But, on their first album from...

The AIWA AD-F880 just has a couple shims installed and they would be enough with the original head, while with this other head I had to add some more thickness to reach the right head height... and I also had to also tweak tilt angle a small bit, which is easy to do by adding a half shim only...

good that i've made a close-up pic of the soldered joints. at first sight everything looked ok... now, looking at it again, there might be an unwanted bridge between two soldered joints. Tomorrow, will need to check it better. LOL... o_O:D

for example, i am reinstalling those Technics AX heads i've put the guides on the opposite side as they originally were, to install it on a AIWA. ( I mean the heads mentioned and shown here: https://forums.phxaudiotape.com/threads/what-cassette-deck.9921/page-5#post-328342 ) Checking with a...

This night, I feel a bit dark. :cool: Original first press from 1984.

absolutely, so. in most situations, to properly reinstall the head you need some kind of alignment gauge.

I fear at YT there isn't anybody doing it the right way, even if i didn't check them all. for sure, there is a guy who makes it in a way that, after "lapping", the head is good to be trashed! ;) I use to avoid spreading such stuff on public just to NOT encourage people to DIY... it needs a...

Sure! On factory they would use different methods. And, of course, there are more viable methods for doing it at home. The lapping film method is the one I've learnt from Alex and which I've used myself, just that. Also, about lapping film, there are (at least) two kinds of it, based on...

that's nice! :) thanks for sharing.

i never tried any other methods than the lapping film one, then i cannot judge. but if FR was restored properly then evidently you made a nice job.

yes, all the 3 models mentioned by Alex share that same head.

I suspect you are just right. :)

indeed, it always worked just fine with the voice that God gave to the singers, before they introduced that crappy processor... the problem with autotune is that, especially if you use it in real time, you can try to use the lightest hands in setting it up but it will just make your voice...