perkri: Glad to hear you’re going to delve into a pair of Heathkit UA-1’s. I’ve restored a few of these along with Heathkit EL84 integrateds which use essentially the same circuit. Some things I learned: Use the schematic to the UA-2; minor but important changes. Use orange drop caps for a (slightly) vintage sound, fancy caps for a more modern sound. Good luck finding good 6AN8 tubes! Buy a bunch 😆. Rewire the feedback switch to full feedback and no feedback. The Heathkit circuit is designed to be totally stable with no feedback. Also, the 6AN8 that is the quietest without feedback is a keeper. Most importantly, the power supply was designed for a 115 VAC primary. Today’s AC at 120 VAC+ will run the outputs at or beyond their limits so build a bucking transformer, simple and cheap. This also applies to ANY vintage tube circuit. I have a set of rebuilt UA-2’s on my den system driving B&W 805 D3’s with no want of any more power. It’s glorious 👍.
The Allure of Vintage Audio Gear
Vintage audio gear holds a unique charm, offering rich sound and timeless design that many modern components can't quite replicate. Brands like Marantz, McIntosh, and JBL are still revered for their warm, detailed sound, especially in tube amps and classic speakers. While modern technology offers improved reliability and lower distortion, vintage gear brings a sense of nostalgia and character that many audiophiles crave.
Do you prefer the warmth of vintage, or do you lean toward modern hi-fi innovations? How would you mix vintage with modern in your setup?
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- 64 posts total
- 64 posts total