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PostPosted: Sat Aug 03, 2013 8:18 am 
King of the Skip Monkeys
King of the Skip Monkeys
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Joined: Wed Nov 07, 2007 4:34 pm
Posts: 26146
Location: Moomin Valley
here you go. The lecson amps are boxed up.

as for the guys at the tip, I'm just honest. I go halves with them now and again which keeps them happy.


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PostPosted: Sat Aug 03, 2013 6:38 pm 
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Joined: Thu Oct 13, 2011 9:30 am
Posts: 958
Location: Malvern
That Lecson system will be worth a fortune boxed as new!


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PostPosted: Wed Aug 07, 2013 10:02 pm 
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Joined: Thu Oct 13, 2011 9:30 am
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Location: Malvern
Jeez, this 34 is fighting me all the way!

Sorted the input switching out (logic chip fried). :) Testing the audio path tonight - no output both channels. :facepalm: Traced it to the tape monitor logic gate, its also fried because if I short the signal path through it, signal gets as far as the output mute circuit ... where it stops :facepalm: Output mute circuit is not switching out of mute even when the PSU is stable... I suspect a leaky transistor after the comparator. I'll sort the tape monitor logic out first (parts on order) and then think about the mute circuit!

Still, at least it should be ready for the hifi selling season!! :lol:

Decided to sell on the FM4 as 'spares only'. In technical terms, it's whats known as f*cked. When I started investigating it, the battery leak has dissolved most of the tracks within a few inches of it, including the tracks near the processor. Shame. I always wanted an FM4...


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PostPosted: Thu Aug 08, 2013 8:57 am 
Old School Grand Master
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Joined: Fri Dec 10, 2010 10:40 pm
Posts: 3459
Location: The Royal Society of Insobriety
I have this Garrard SP 25 MKIV with a Shure head that is surplus to requirements, it is working but not in 'auto' which seems to be a common fault.

I'd ideally like to swap for a 'vintage-ish' Amp that I can run a turntable and ipod through - anyone got ought?

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PostPosted: Thu Aug 08, 2013 10:29 am 
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Location: Malvern
I have a couple of Leak Stereo 30's, though I'd want cash rather than the SP25. Would have to check they're working, and I wouldn't like to say for sure it would be a good match to an iPod!


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PostPosted: Tue Aug 13, 2013 4:45 pm 
Old School Grand Master
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Joined: Sun Aug 21, 2011 11:57 pm
Posts: 4074
Location: Antwerp, Belgium
Still thinking what I should do with this one. No idea what's wrong with it, but I'm certain it won't be easy to fix.

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PostPosted: Thu Aug 15, 2013 8:21 am 
King of the Skip Monkeys
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Location: Moomin Valley
Rod_Saetan wrote:
I have this Garrard SP 25 MKIV with a Shure head that is surplus to requirements, it is working but not in 'auto' which seems to be a common fault.

I'd ideally like to swap for a 'vintage-ish' Amp that I can run a turntable and ipod through - anyone got ought?

Image
Image


I have a few amps available - Garrard is ebay fodder I'm afraid.


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PostPosted: Fri Aug 23, 2013 9:37 pm 
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Joined: Thu Oct 13, 2011 9:30 am
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Location: Malvern
Yay! Sorted the tape monitor switching at last :)

Just need to sort the 'mute' which should be simple. It's all polished up and looking like new and almost ready for a new owner.


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PostPosted: Tue Aug 27, 2013 12:34 pm 
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Joined: Tue Oct 09, 2007 1:55 pm
Posts: 8202
Location: New Forest, UK
Raging_Bulls wrote:
Still thinking what I should do with this one. No idea what's wrong with it, but I'm certain it won't be easy to fix.

Image


You might be surprised - it's all discrete components so somebody with a bit of love and an oscilloscope should be able to help. Is it valve or transistor?


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PostPosted: Thu Aug 29, 2013 12:00 am 
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Joined: Thu Oct 13, 2011 9:30 am
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Location: Malvern
Finally complete!

That was 'challenging'. Replaced pretty much every IC involved with the switching logic, several bits of the mute circuit, two LED driver transistors, and all the electrolytics - before I even thought about upgrades! The paint's not to everyone's taste but I like it :)

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