[sdiy] various

[metasonix]

At 12:16 PM 6/27/03 -0700, you wrote:
>So, its been in the 90s here in the lovely temperate SF Bay Area 

It's 105 degrees up here at Clear Lake....
plus vast terrifying clouds of mosquitoes at night....
Don't move here!! Keep Lakeport empty! 
Stay in the bay area! (Die in the smog! haha!)

>What in the heck is COSMOS? 

Old RCA brandname for their CMOS line. Of no real importance
at this late date, as I don't think anyone uses it anymore.

>In this circuit it uses two stancor a-4713 driver
>transformers and then four diodes to create a passive
>ring mod. What would be a purchasable transformer I
>could use in its place?

I know people who can find out the spec, if you like....

They are probably just 600-600 ohm coupling transformers,
1:1 ratio, as those were commonly used with solid-state diodes.

If you prefer driving a higher impedance, you can try
10k:600 ohm transformers instead (Mouser 42TL019), with
the 600-ohm windings going to the diodes.

Tim is using 10k-10k transformers, because the 6AL5 tube 
diodes have higher forward impedances.