Audio Horizons TP 2.0 Preamplifier

Sherod
I put in my CCa's about the same time you did, turn the preamp off when not using and have it on about 6 hours per day and the cca's still test very well on my tester and best I can tell no degrading of the sound. I picked up a B&K Model 606 tester for about $100 on ebay in excellent condition at the time I got the cca's and find it perfect for my purposes and easy to use. Hope this helps
Joe

Joe,
Yes, I recall us both putting in the cca's. I also turn my preamp off at night and the average daily use is also about 6 hours. They do still sound very good. I'll look into a used, calibrated B&K 606.

I'll look into a used, calibrated B&K 606.
Sherod (Threads | Answers | This Thread)

It's easy to calibrate the B&K 606. The manual has instructions. It requires a resistor (value specified in the manual) and a screwdriver. It's all done without opening up the tester. Simple to do. So don't pass up a B&K 606 in otherwise good condition only because it hasn't been recently calibrated.

Hi guys,it's been awhile.Recently acquired a quad of 6H23 Russian military tubes.Manufactured in a collective factory in Kaluga,not Kahula(joke)they are a drop-in replacement for the 6922 tube.Sonically they are as good as my Siemens ECC88's but do not have the finesse of a CCa.For something different and everyday use they're a perfect fit.

It's interesting to me to note that recent comments on this thread concern tube rolling.

One of the attributes of the TP 2.2 that most enthused the PositiveFeedback reviewer (see my 6/5 post for link) is the responsiveness of the TP 2.2 to tube selection.

We are living what the reviewer described.