68spider
Responses from 68spider
| Koetsu Urushi + MC step up transformer Of course, I don't actually have a CD player but I guess a tuner would do. I did try a few days with it connected to the output of the transformer (cartridge disconnected) but you think connected to the input would be better? | |
| Koetsu Urushi + MC step up transformer The "sucky sound" is a lot of harshness in the upper treble - quite unpleasant. Also, the sound stage has gone completely flat, all the air and space around the instruments has disappeared. Bass seems OK. There is no problem with the gain, the 13:... | |
| Koetsu Urushi + MC step up transformer Yes, I've tried pretty much every combination of set up including directly connected with no other loading - which would be a 278 ohm load on the cartridge - it all sucks. And pretty much to the same effect, there doesn't seem to be much variation... | |
| Koetsu Urushi + MC step up transformer It is a transistor pre-amp, I don't have a schematic of the PF1, the instruction manual only states that it is the industry standard 47,000 ohms shunted by 100 pF. It describes how to lower the impedance with a parallel resistance but not how to i... | |
| Koetsu Urushi + MC step up transformer The maths works out as 47000/(13*13) = 278 ohms and I'll give that a try tonight.Trying to replicate a 47K load through the transformer works out as 8M (47K*13*13) ohms as Lew points out. That will require modifying the pre-amp and seems quite a b... | |
| Koetsu Urushi + MC step up transformer OK here's the specifics of the set up so far:Lundahl LL1681 MC transformers using the 13:1 tap.With a primary resistance of 9.6 ohms and a secondary resistance of 1640 ohms, courtesy of K & K I get:Req Load......Resistance50..................1... |