Extremely high parts quality single ended 2A3 directly heated triode amplifier. This amplifier is hand wired, point to point, on a solid copper top plate. It uses Hirata Tango output transformers, the XE-20S. Dave Slagle and I modified the circuit to transformer coupling and LED bias. The input/driver circuit is the Amperex 7788 transformer coupled to the 2A3. The interstage transformer is dave's (Intact Audio) nickel (permalloy) bifilar 1:1. The power supply capacitors are the now unobtanium (like the output transformers) Elna Cerafine. Power supply rectification is the tried and true 5AR4, which guarantees a nice, slow rise of the high voltage. The amplifier also uses massive vintage potted power supply iron. I ran sweeps of the amplifier and it has -3dB points of 17Hz and 110kHz... yes, you read that correctly... a transformer coupled amplifier that measures that well... and NO peaks before either of those roll offs.. I also replaced the sockets as one had become noisy. This baby is very quiet on 105dB+ horns. asking US$3000 and worth nearly that in parts! peace,
me
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| Payment and Shipping |
| Pay By: |
Personal Check after it clears, Paypal, Money Order/Certified Check |
| Ship Weight: |
40 lbs. |
| Ships From: |
12572 (Rhinebeck, NY) |
| Ships To: |
WorldWide |
| Shippers/Payer: |
UPS / Paid by: Buyer |
| Shipping Notes: |
(none)
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