AudioCats's latest activity
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AudioCats replied to the thread Any opinions / reviews on Gemtune APPJ PA1502A.after adding the wood box under the 1502A, it is no longer easy to work on the circuit board, at least the underside of it... I think I... -
AudioCats replied to the thread Any opinions / reviews on Gemtune APPJ PA1502A.yeah, those are some interesting little transformers. From what I can see in the mini2013, the output transformer core appears to be...
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AudioCats replied to the thread 6n5p (6AS7/6080) + 6n11 (6DJ8/6922) OTL headphone amp kit.From what I can see, the additional parts needed to complete this amp, to a somewhat "good-enough-sounding" state, will be: -- 150v/100w...
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AudioCats replied to the thread 6n5p (6AS7/6080) + 6n11 (6DJ8/6922) OTL headphone amp kit.the amp portion is basically the same as the darkVoice 336se. They use different input tubes (this one uses 6DJ8, while DV336se uses...
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AudioCats replied to the thread 6n5p (6AS7/6080) + 6n11 (6DJ8/6922) OTL headphone amp kit.the parts kit arrived, transit time was a little over 2 weeks, not bad. Parts look good, actually better than in the photos. LT1083 is...
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AudioCats replied to the thread Any opinions / reviews on Gemtune APPJ PA1502A.almost forgot..... output transformer upgrade attempt: I bought a pair of "Luge amorphous output transformer" and tried it with...
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AudioCats replied to the thread Any opinions / reviews on Gemtune APPJ PA1502A.I am not aware of the "diode mod". The only place I can see to put in a diode of some kind, in the signal stream, is to replace the...
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AudioCats replied to the thread 6n5p (6AS7/6080) + 6n11 (6DJ8/6922) OTL headphone amp kit.If you have enough loose parts laying around, this 5670/6as7 headphone amp can make a good project as well. Probably an easier build...
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AudioCats replied to the thread Douk Audio P7 amp.FYI... the amplifier PCB (looks to be very similar to what is in a little bear P8) is available on ebay from Jims Audio...
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AudioCats replied to the thread 6n5p (6AS7/6080) + 6n11 (6DJ8/6922) OTL headphone amp kit.somewhat off topic..............aliexpress seems to have quite a few tube amp kits on sale lately, like this 12ax7/el34 kit (including...
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AudioCats replied to the thread Any opinions / reviews on Gemtune APPJ PA1502A.pushing a pair of HE6se, the modded 1502A sounds quite a bit fuller, more ambient and more spacious than the modded Mini2013. Both...
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AudioCats replied to the thread Any opinions / reviews on Gemtune APPJ PA1502A.looks like the mini2013 is another one of appj's dead end design, easy to fail under certain (though unusual) scenarios. The HV rail...
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AudioCats replied to the thread 6n5p (6AS7/6080) + 6n11 (6DJ8/6922) OTL headphone amp kit.(I probably should have figured this out before placing the order..............) by looking at the picture of the PCBs, the "G40N1500"...
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AudioCats replied to the thread 6n5p (6AS7/6080) + 6n11 (6DJ8/6922) OTL headphone amp kit.Parts kit (PCB and all electronics component, excluding volume pot and tubes) are now $30 on aliexpress. might be worth considering, at...
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AudioCats replied to the thread APPJ Mini2013 Tube amp (6J1 pushing 6P1, 3w per channel).inter-stage signal capacitors: these capacitors block less than 100v under normal operating condition, but in the worse-case scenario...
