Showing 1 of 118 conversations about:
rastus
1029
Jul 16, 2018
bookmark_border
My budget "starter" tube amp, read; start spending money... that with a little help - is still with me, sounds just wonderfully, sonically, lubricious (musical) with the Elex's... a nice DAC and DSD...
Keep the tubes that come with it for test purposes, esp. if you replace caps.
Listen to those tubes first though, it's a baseline, then move on, i.e. ship the unit back or replace them (the move to prepare for).
Needful things to get your reward:
Replace the interstage caps with 0.47uF; Mundorf supreme's will allow you to put the cover back on (retain shielding), got mine here: https://www.ebay.com/itm/0-47-uf-1000VDC-MUNDORF-M-CAP-Supreme-Capacitor-0-47-uf-600-VDC-for-Audio/192319064599?hash=item2cc71c0a17%3Ag%3AH4QAAOSw2s1Uz5Na&_sacat=0&_nkw=mundorf+0.47uf&_from=R40&rt=nc&LH_TitleDesc=0
search


I also replaced the cathode caps with 1000uF Elna SIMIC II's: https://www.digikey.com/product-detail/en/elna-america/RFS-25V102MJ8-5/604-1059-ND/970220
The CBS (Hytron) 6V6GT's are the best I have used in the 1502A, a very open stage: https://www.ebay.com/itm/CBS-6V6-GT-NOS-MATCH-PAIR-1950s-5E3-ORIGINAL-BADBOY-RAUNCHY-OVERDRIVE-C05/223058149948?hash=item33ef4d423c%3Ag%3A9m0AAOSwKGpa53Rg&_sacat=0&_nkw=6v6gt+nos+pair&_from=R40&rt=nc&_trksid=p2334524.m570.l1313.TR0.TRC0.A0.H0.X6v6gt+nos+pair.TRS1&LH_TitleDesc=0
Preamp tube,, many choices,,, mine now goes between a 12BH7A or an E80CC: https://www.ebay.com/itm/NIB-1962-Vintage-Amperex-E80CC-6085-GOLD-Premium-TESTED-STRONG-96-96-NEW-NOS/332689683988?hash=item4d75d9b614%3Ag%3AgCkAAOSw9gRaNS6u&_sop=16&_sacat=0&_nkw=E80CC+NOS&_from=R40&rt=nc&LH_TitleDesc=0%7C0
Thread fyi: https://www.head-fi.org/threads/any-opinions-reviews-on-gemtune-appj-pa1502a.780178/
Jul 16, 2018
Mecii
33
Jul 16, 2018
bookmark_border
Thanks for the info - Very helpful...
Jul 16, 2018
Volly
312
Jul 17, 2018
bookmark_border
Do you have any other tube amps to compare to in your inventory @ratus, I've got a Darkvoice and love it with my 650's, looking at adding another tube amp for a second setup. Would the APPJ be in the same ball-park with the DV in terms on sound?
I really love the look of this thing too!
Jul 17, 2018
rastus
1029
Jul 17, 2018
bookmark_border
I'm the opposite, listening to a SET, but intrigued by the OTL, taking the problem noisy/distorting transformer out of the path... OTL gets rid of the noisy things, but at a price, you add caps. But,, you can get nice caps... you can also get nice transformers,, they just cost more... I have almost picked up a used La Figaro 339,, but I want a nice 300B SE for my speakers first...
To answer your other question; if you are willing to upgrade this 1502A with the caps and put some nice NOS tubes in it, it's worth it I feel. You will have a nice SET that will now work better with some cans than your OTL, and you can play around. Why you see it noted (elsewhere) that it has Japanese Z11 steel transformers, it matters, still a budget amp,, that I may never part with... would gift first.
I sometimes carpool with a fellow who now heads an audio R&D department, who also ran the soundboard for the Dead at one point. We got to talking about transformers, Tango, Tamura et al. and how critical the material/orientation is to the end result, shit goes deep, like Tamahagane... The C-Core amorphous transformers look interesting to me, such as Audio Note uses,, or the Lundahl's with silver wire winding,,, just takes money.
search
Jul 17, 2018
View Full Discussion