bozebuttons Posted February 20, 2016 Report Share Posted February 20, 2016 Took my Cary 300sei out of the garage not heated where it has been unused for over a year, amp was pretty cold temps in the high 40s. I should have let it get to room tempature but I didn't Amp turned on got a hum from the transformers I really never noticed before,Input tubes light up but My WE300bs never light up. Ideas? I have another set of we300bs ,but I don't want to take a chance installing them. I don't have any cheaper tubes to try. Quote Link to comment Share on other sites More sharing options...
spritzer Posted February 20, 2016 Report Share Posted February 20, 2016 (edited) Open it up and see if there is anything amiss? I think the tubes are AC heated in the 300sei so they should work unless the transformer is busted. Edit: Light up that is. Edited February 20, 2016 by spritzer Quote Link to comment Share on other sites More sharing options...
jpelg Posted February 21, 2016 Report Share Posted February 21, 2016 Ooohhh, hope the amp is ok Tom. It has a special place in my heart since I first heard it 15 years ago. Maybe have the guy who did the mods on it have a look? Quote Link to comment Share on other sites More sharing options...
robm321 Posted February 21, 2016 Report Share Posted February 21, 2016 I'm a fan of that amp too. Hope it is something simple. Quote Link to comment Share on other sites More sharing options...
spritzer Posted February 21, 2016 Report Share Posted February 21, 2016 I just looked at the internal pics I have of the stock 300SEI and the heaters for the 300B's are bad...real bad. They are just a tap off the transformer, fed through a diode bridge and into the tubes. Quite possibly the worst way to do this. Quote Link to comment Share on other sites More sharing options...
jp11801 Posted February 22, 2016 Report Share Posted February 22, 2016 Tom I would invite in a cheap pair of 300b tubes while sorting this out as the price on the WE just keep going up and up. Good luck as I really liked your modded Cary Quote Link to comment Share on other sites More sharing options...
mikeymad Posted February 22, 2016 Report Share Posted February 22, 2016 my 300sei went silent years ago - (blew a resistor). I replaced it - and it blew again - so that was not the issue. -- I have not gotten back to it... (and you Don't want to see the inside of this thing.. ooph).. I would give Cary support a call as well - the people I talked to years ago were very nice and helpful (at the time). good luck. Quote Link to comment Share on other sites More sharing options...
bozebuttons Posted February 22, 2016 Author Report Share Posted February 22, 2016 I have seen the insides it a rats nest for sure. I will open it up when I get the chance.& look for any visual signs/ a schematic would be helpfull mine is the older 11 watt version. Quote Link to comment Share on other sites More sharing options...
DefQon Posted February 22, 2016 Report Share Posted February 22, 2016 Or get in contact with Dennis Had directly via his email and see if he can give some pointers on troubleshooting/what is wrong. He did so with a few Cary products that went south that I owned years back. Quote Link to comment Share on other sites More sharing options...
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