thebartman1970 Posted February 14, 2014 Report Share Posted February 14, 2014 Greetings all! a newbee here I have an econo phono/valve amp that I picked up years ago second-hand and have no clue where it was purchased or manufactured. It appears to have Chinese writing on it and it also does have "GUANGHENG TM300 - TM400AB" on the transformer cover. The transformer is fried and I'm not sure if it's worth repairing but I would do so if I can find one and it's a reasonable cost. Here's a couple of pics and thanks for your time. Link to comment Share on other sites More sharing options...
nikongod Posted February 14, 2014 Report Share Posted February 14, 2014 I had one of those amps once. A proud member of head-fail and the any octal tube, any octal socket group plugged the totally wrong tube into the hole where the (whatever the non-pin compatable power tube with a top cap is) goes and blowed it up. "but it was an octal tube." I fixed it (totally destroyed cathode resistors for the output tubes) and donated it to a head-fi meet a few years back. If you are asking what to do, instead of reading the markings on the transformer and finding a suitable replacement yourself, would suggest taking a large hammer and smashing it up. 2 Link to comment Share on other sites More sharing options...
n_maher Posted February 14, 2014 Report Share Posted February 14, 2014 I'm with Ari, there is very little point in "fixing" this amp. You'd likely invest far more than this is worth in fixing it and still be left with a turd with a presumably nicer transformer. Link to comment Share on other sites More sharing options...
spritzer Posted February 14, 2014 Report Share Posted February 14, 2014 I third that as even if you find some super cheap transformer to use in that spot, it's not really worth saving. Link to comment Share on other sites More sharing options...
nikongod Posted February 14, 2014 Report Share Posted February 14, 2014 If memory serves - something cool (and somewhat rarely seen) about this amp is that it runs the gain tubes in pentode mode. Crazy mega bandwidth like whoa. Until you get to the shitty output transformers. A good enough idea to learn from at least Link to comment Share on other sites More sharing options...
wink Posted February 15, 2014 Report Share Posted February 15, 2014 It makes a novel doorstop. Link to comment Share on other sites More sharing options...
kevin gilmore Posted February 16, 2014 Report Share Posted February 16, 2014 not heavy enough for a door stop 2 Link to comment Share on other sites More sharing options...
Voltron Posted February 16, 2014 Report Share Posted February 16, 2014 not heavy enough for a door stop /thread Link to comment Share on other sites More sharing options...
Wmcmanus Posted February 16, 2014 Report Share Posted February 16, 2014 /thread Seems like good advice to me. Link to comment Share on other sites More sharing options...
wink Posted February 17, 2014 Report Share Posted February 17, 2014 Yep, makes a wonderful threadstop. So would the chassis if it were more wedge shaped. Link to comment Share on other sites More sharing options...
eggil Posted February 17, 2014 Report Share Posted February 17, 2014 Yep, makes a wonderful threadstop. So would the chassis if it were more wedge shaped. Would that be with the tubes on or off? Link to comment Share on other sites More sharing options...
n_maher Posted February 17, 2014 Report Share Posted February 17, 2014 on/off Link to comment Share on other sites More sharing options...
Recommended Posts