UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

snowman_al · 16th May 2019, 1:52 pm

Richard,
We have all been here, the fix it / scrap it dilemma... there is a cost to fixing it, but you might learn something, or scrap it and wonder if it was a simple fault.

Sorry if this is teaching you to 'suck eggs' but if you do continue to try and fix it, it is good advice to replace all the transistors and 1N4148s in the faulty side. Testing them is not the same as the dynamics in use. I would be suspicious of the electrolytic caps too, to the extent of testing each one out of circuit.

I would also buy a bag of 1/4 watt 10 ohm resistors and fit one in place of the HT fuse. Good chance it will go before the darlingtons if there is a fault before them. A lamp tester is almost a must in these situations too.

My preference for the output pairs is the BDW93C and 94C from Fairchild. I have restored a quite a few Nytech and Ion amps that use similar devices and have found them reliable.

Good luck! Alan

16th May 2019, 1:52 pm	#23
snowman_al Octode Join Date: Dec 2018 Location: Llandeilo, West Wales, UK. Posts: 1,092	Re: Creek 4040 help please! Richard, We have all been here, the fix it / scrap it dilemma... there is a cost to fixing it, but you might learn something, or scrap it and wonder if it was a simple fault. Sorry if this is teaching you to 'suck eggs' but if you do continue to try and fix it, it is good advice to replace all the transistors and 1N4148s in the faulty side. Testing them is not the same as the dynamics in use. I would be suspicious of the electrolytic caps too, to the extent of testing each one out of circuit. I would also buy a bag of 1/4 watt 10 ohm resistors and fit one in place of the HT fuse. Good chance it will go before the darlingtons if there is a fault before them. A lamp tester is almost a must in these situations too. My preference for the output pairs is the BDW93C and 94C from Fairchild. I have restored a quite a few Nytech and Ion amps that use similar devices and have found them reliable. Good luck! Alan __________________ Never Leave Well Enough Alone...