drchopps Posted May 31, 2014 Share Posted May 31, 2014 I have recently blown one of the transistors in the power amp of my Hartke LH1000 and am trying to get hold of one to replace it with. I have contacted Hartke but they are apparently not very prompt with their email replies. I have identified the transistor on the schematic as A1837 and was wondering if anyone could help me source one of these? I took it to RS Components but they couldn't help and I really don't want to pay a repair man to do a fix I can carry out myself. Any help would be really appreciated Cheers Quote Link to comment Share on other sites More sharing options...
Dad3353 Posted May 31, 2014 Share Posted May 31, 2014 [quote name='drchopps' timestamp='1401533150' post='2464468']...Any help would be really appreciated...[/quote] Any good..?... [url="http://www.ebay.com/itm/10pcs-2SA1837-A1837-Power-Amplifier-Transistor-NEW-/220656785215"]A1837 sur t'bay...[/url] It's Korg that handle Hartke spares in the UK, I think; I've always found them to be more than helpful. Quote Link to comment Share on other sites More sharing options...
JapanAxe Posted May 31, 2014 Share Posted May 31, 2014 Do the power transistors need to be matched? Quote Link to comment Share on other sites More sharing options...
MoonBassAlpha Posted June 1, 2014 Share Posted June 1, 2014 Search ebay for 2sa1837 for uk seller. Cheap as chips! Quote Link to comment Share on other sites More sharing options...
steve-bbb Posted June 2, 2014 Share Posted June 2, 2014 phone the cellphone number on hartke website - it goes straight to mr hartke - ive emailed before and found them fairly prompt and helpful Quote Link to comment Share on other sites More sharing options...
icastle Posted June 8, 2014 Share Posted June 8, 2014 Couple of things to bear in mind here: 1) Unless you can ascertain and correct the issue that caused the power transistor failure in the first place, putting new ones in isn't sensible. 2) If one of the power transistors has failed then there is a fair chance that the others (having been equally battered) are not far off failure as well. Quote Link to comment Share on other sites More sharing options...
Make1-4u Posted July 29, 2014 Share Posted July 29, 2014 I am working on a LH 1000 and need a schematic. Any help would be appreciated Quote Link to comment Share on other sites More sharing options...
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