Audio Technica ATLP 1240

always listening
kramer
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Re: Audio Technica ATLP 1240

Post by kramer » 09 Nov 2018 12:05

Hi,

A few years ago I successfully removed the preamp from my old ATLP 120 as per YouTube instructions and it sounded a lot better.

However despite lots of helpful advice (which I sort of understand) the ATLP 1240 preamp does not look as straightforward as the ATLP 120 and therefore I've not been brave enough have a go so far.

I would really like to know if anyone has attempted to bypass the preamp circuitry whilst retaining the PCB board and the female RCA connectors and if so, did you take any step by step pictures of the modifications? as they would be a big help to me.

Thanks.

kramer
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Re: Audio Technica ATLP 1240

Post by kramer » 11 Nov 2018 16:06

Hi, all after 2 years of should I, shouldn't I, finally got up the courage to open up my AT LP 1240. Had an idiotic eureka moment when I went over some old posts on vinyl engine and realised I had been stressing about nothing.

Stupidly (well I have zero electronics ability) I realised that I mistaken the PCB board adjacent to the RCA's for the preamp when in fact it was the tan PCB just just above it.

Playing safe, I removed the connectors from the preamp board and reassembled to check that everything still worked.... it did.

Next stage is to completely remover the preamp PCB and unsolder the tone arm wires from the other PCB and the resolder them to some new female RCA's... what possibly go wrong? :shock: see attached idiots (me) guide...
Attachments
Clipboard01.jpg
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kramer
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Re: Audio Technica ATLP 1240

Post by kramer » 18 Nov 2018 18:14

OK, mission accomplished, deck survived my ham fisted mods and is now sounding very very good.

So if anyone's interested in voiding their warranty on their Audio Technica AT LP 1240 here's how I did it.
preamp labels.jpg
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Detach these three connectors the unscrew the preamp
02.jpg
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03.jpg
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De solder ground wire from intermediate PCB
06.jpg
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Solder tonearm wiring to new RCA's
08.jpg
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That's about it, deck still works and sounds a lot better. But attempt this mod at your own risk, I accept no responsibility for any bricked decks.

mrcharlieboy
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Re: Audio Technica ATLP 1240

Post by mrcharlieboy » 04 May 2019 00:27

Did this also other than I ran rca leads right from the tonearm wires. Piece of cake. Took about 30 minutes. Sounds great!

lenjack
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Re: Audio Technica ATLP 1240

Post by lenjack » 04 May 2019 00:55

Placebo effect? Can be very strong. It could be hard to admit you did all that work for nothing. Obviously, you can't AB this.

mrcharlieboy
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Re: Audio Technica ATLP 1240

Post by mrcharlieboy » 04 May 2019 02:27

lenjack wrote:
04 May 2019 00:55
Placebo effect? Can be very strong. It could be hard to admit you did all that work for nothing. Obviously, you can't AB this.
I can and did. I have two 1240's and there indeed are positive improvements after I bypassed all the internals and ran Cardas cable straight from the tonearm to my plinius phono pre.

lenjack
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Re: Audio Technica ATLP 1240

Post by lenjack » 04 May 2019 02:36

I'm impressed that you took the pains to do that, but you could still be victimized by the placebo effect. Please understand...I'm not saying you were...only that it's possible.

mrcharlieboy
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Re: Audio Technica ATLP 1240

Post by mrcharlieboy » 04 May 2019 02:43

lenjack wrote:
04 May 2019 02:36
I'm impressed that you took the pains to do that, but you could still be victimized by the placebo effect. Please understand...I'm not saying you were...only that it's possible.
If I cannot hear the difference between a 5.00 or a 5,000.00 dollar power cord, interconnect, or whatever it may be I don't want it or need it so I understand. I have witnessed the placebo effect with many I know over the years though and justification of spending enormous amounts of money is strong with some of them.

lenjack
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Re: Audio Technica ATLP 1240

Post by lenjack » 04 May 2019 02:48

Please don't misunderstand me. I do respect your opinion. :)

mrcharlieboy
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Re: Audio Technica ATLP 1240

Post by mrcharlieboy » 04 May 2019 02:51

Oh no that's what I'm trying to tell you. I get what you are saying for sure also. That placebo can be a mother f'er! :)

lenjack
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Re: Audio Technica ATLP 1240

Post by lenjack » 04 May 2019 02:54

OK...we cool then. Cheers, my friend. 8)