Got a pair of these Dynaco Mk IIIs on steroids on Ebay after hearing about their great reputation. They sound sweet using the 8 ohm taps with 8 ohm speakers! The only problem is my preferred speakers are rated at 4 ohms; there is only a trickle of sound using the 4 ohm taps, and the sound of the speakers are way off if I use the 8 ohm taps with them. The only local repairman who will look at tubes swore that there couldn't be 4 ohm taps on a Dynaco amp, so I crossed him off the list.
It seems that someone in the past replaced the binding posts and may have tampered with the wiring in the process. I'm just trying to find out if anyone might glance at my photos and see if they can give me a clue about why the 4 ohm tap might not work on either channel.
Thanks!
https://drive.google.com/file/d/0BxGqB8rQeVOfMzFSTVg4TWVoZW8/view?usp=sharing
https://drive.google.com/file/d/0BxGqB8rQeVOfSGRRM21pQnJDVUE/view?usp=sharing
It seems that someone in the past replaced the binding posts and may have tampered with the wiring in the process. I'm just trying to find out if anyone might glance at my photos and see if they can give me a clue about why the 4 ohm tap might not work on either channel.
Thanks!
https://drive.google.com/file/d/0BxGqB8rQeVOfMzFSTVg4TWVoZW8/view?usp=sharing
https://drive.google.com/file/d/0BxGqB8rQeVOfSGRRM21pQnJDVUE/view?usp=sharing