Recent content by archieaa1

Ok, I"ll bite. Born in Detroit, Raised and lived most of my life in Ann Arbor. Forced to relocate out of state when Pfizer closed the Ann Arbor site. My wife was Pfired. Just waiting for the day when we can move back home. Personally I'm fond of the numbers 34 and 32. what do you say.... Archie

The best thing to do in Cleveland is the get down on your knees and thank God (or who/whatever one thanks) that you are not in Toledo. A town that was boring to even John Denver. 'Nuf said. Archie

First we need to understand a couple basic terms. 1. Resistance, This is the opposition to flow of a DC voltage. Its measured in ohms and it does not change with frequency which means that there is no energy stored in the system being measured. 2. Impedance. This is used to describe reactive...

The 6146 was used on only the very earliest SVTs. A 1976 SVT should not have 6146 tubes in it. From what I have been told they switched from 6146s to 6550s after the first run somewhere around mid 1970. The 6550 proved to be more reliable and less expensive. Most of the SVTs that had 6146s have...

In the later Linden NJ production ( any that use a 6AN8 tube ) there are no changes needed to use 6550 in these amps. This isn't according to me, Its from the Ampeg manuals and schematics from the era. As to how to use 6550s in the earlier Linden NJ production ( amps using a 6K11 tube )...

Ive used V-4s for the past 25 years. The reason to switch to 6550 output tubes has more to do with tone than output. To my ears, the V4 with 6550s sounds more like an SVT than the V4 with 7027s. I have all three. The SVT really isn't much louder than the V4. Keep in mind that to get twice as...