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PPX idle warm up time
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colint View Drop Down
Old Croc
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Joined: 06 October 2007
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Points: 5260 		Post Options Post Options   Thanks (0) Thanks(0)   Quote colint Quote  Post ReplyReply Direct Link To This Post Posted: 10 April 2012 at 9:18pm
Originally posted by GregM GregM wrote:

Update time - just in case anybody was actually following the story of my migration back from HH to Citronic.....
 
Despite being filthy inside and out, it works!, both channels pump away, although channel B did seem a tad quieter in my very untechnical test.
 
The fan switch (presumably a thermistor?) did have an intermittent fault, there was what I guess was a dry joint/fractured cable at the heatsink end - a quick strip back and resolder and the fan pops in and out every 5-6 mins as you guys suggested it would.
 
I do need to spend a fair bit of time cleaning it out and tidying up the casework - (oh, and finding some front handles!), then it'll find a new job which may just become a core part of my home hi fi Smile
 
Martin - out of curiousity, would you happen to have a full copy of the service manual and schematics for the PPX450 I could see?, I really fancy seeing how much of my ancient BBC training I could remember - then, when I bugger it up I can add the PPX to the pile of kit waiting to find their way to you for service and/or repair!!
 
Greg

What part of the handles are you looking for Greg? if it's the front panel/plate with the handle supports on there are some on ebay at the moment, the front pieces you can make up from some steel bar very easily.
Col.
Never criticise another man until you've walked a mile in his shoes. Once you have, call him what you like, you're a mile away and you've got his shoes!
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GregM View Drop Down
Young Croc
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Joined: 13 December 2009
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Points: 525 		Post Options Post Options   Thanks (0) Thanks(0)   Quote GregM Quote  Post ReplyReply Direct Link To This Post Posted: 10 April 2012 at 9:29pm
Originally posted by colint colint wrote:

 
What part of the handles are you looking for Greg? if it's the front panel/plate with the handle supports on there are some on ebay at the moment, the front pieces you can make up from some steel bar very easily.
Col.
 
Col - it's the easy bits I'm missing, the flat steel strips - some bozo obviously took them off a long time ago so I just need spend a bit of time measuring up.
 
Greg
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colint View Drop Down
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Points: 5260 		Post Options Post Options   Thanks (0) Thanks(0)   Quote colint Quote  Post ReplyReply Direct Link To This Post Posted: 10 April 2012 at 9:36pm
Ok that's going to be a bit easier on the wallet, if you want to make them up & send them to me and I'll get them powder coated for you it'll last longer than paint.
Never criticise another man until you've walked a mile in his shoes. Once you have, call him what you like, you're a mile away and you've got his shoes!
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GregM View Drop Down
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Joined: 13 December 2009
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Points: 525 		Post Options Post Options   Thanks (0) Thanks(0)   Quote GregM Quote  Post ReplyReply Direct Link To This Post Posted: 10 April 2012 at 9:49pm
Originally posted by colint colint wrote:

Ok that's going to be a bit easier on the wallet, if you want to make them up & send them to me and I'll get them powder coated for you it'll last longer than paint.
 
Thanks Col, thats a nice offer - and it may, just, swing the idea of a PPX gracing the lounge to the good woman!
Remember, if you don't want to hear the answer, don't ask the question!
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Mhamplification View Drop Down
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Joined: 16 July 2009
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Points: 541 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Mhamplification Quote  Post ReplyReply Direct Link To This Post Posted: 11 April 2012 at 9:59am
Greg
I only have the circuit diagrams for the PPX series 
There are lots of different versions and issue numbers
The main pcb is either PC1061/4 or PC 1062/4 and issue 1-8
The powers supply seems to be the same throughout
If you see what boards yours has I will try and get it on line somewhere or scan them
Martin
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GregM View Drop Down
Young Croc
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Points: 525 		Post Options Post Options   Thanks (0) Thanks(0)   Quote GregM Quote  Post ReplyReply Direct Link To This Post Posted: 11 April 2012 at 4:00pm
Hi Martin,
 
Just took a look, mine has the PC1061 and PC 1062 boards on channels A & B but both are marked up as Issue J, not numbered 1-8...... Each board is fitted with a trio of J49 and K134 devices.
 
Ian PM'd me a set of schematics which include a few pages I'd not seen before, but still no sign of what seems to be a mystery 'Channel B' power section......
 
Any/all help welcomed.
 
Greg
 
 
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mooreb View Drop Down
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Points: 871 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mooreb Quote  Post ReplyReply Direct Link To This Post Posted: 11 April 2012 at 8:27pm
I'll Help! I have quite a few ppx amps for sale plus i'm sure i've got a few handles (that came with the power switch kit) Smile
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bass*en*mass View Drop Down
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Points: 4007 		Post Options Post Options   Thanks (0) Thanks(0)   Quote bass*en*mass Quote  Post ReplyReply Direct Link To This Post Posted: 11 April 2012 at 8:52pm
tut, tut - do i smell a sales talk?! :)
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GAZ. View Drop Down
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Points: 2428 		Post Options Post Options   Thanks (0) Thanks(0)   Quote GAZ. Quote  Post ReplyReply Direct Link To This Post Posted: 11 April 2012 at 9:36pm
A difference I've noticed in my PPX's is two of them don't have hitachi fets in, the rest do.
I'm guessing the 2 that dont are later ones built after the hitachi fets were discontinued?
100% Earth Moving Bass
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jbl_man View Drop Down
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Points: 11308 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jbl_man Quote  Post ReplyReply Direct Link To This Post Posted: 11 April 2012 at 9:50pm
I have also heard of that Gaz,i think a few of the very late ones had BUZ devices?
Be seeing you.
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GAZ. View Drop Down
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Points: 2428 		Post Options Post Options   Thanks (0) Thanks(0)   Quote GAZ. Quote  Post ReplyReply Direct Link To This Post Posted: 11 April 2012 at 10:28pm
Yeah one of my 150's has BUZ900 and 905's in and one 1600 has something other than hitachi's in, I don't think they're BUZ devices though? Its the only one I have with the later style power switch.
100% Earth Moving Bass
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GAZ. View Drop Down
Old Croc
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Joined: 16 January 2007
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Points: 2428 		Post Options Post Options   Thanks (0) Thanks(0)   Quote GAZ. Quote  Post ReplyReply Direct Link To This Post Posted: 11 April 2012 at 10:32pm
Just been on the phone to another forum member, I've a feeling I may be tempted into owning another PPX or several soon
100% Earth Moving Bass
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