Allegedly two 470 mfd caps in series will match 8 ohms to 600 ohms.

Shack has an 8 ohm to 1000 ohm c.t. transformer that could work, too. Just pick
off half the 1000 ohm side.

Bill, K5BY
SE Texas

In article , WShoots1 wrote:
Allegedly two 470 mfd caps in series will match 8 ohms to 600 ohms.

No, but that will block DC.

The issue here is not impedance matching so much as level.

Plus, the -10 interface is MUCH higher than 8 ohms.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

Consumer impedance is HI Z (10-20K) not 8 ohms...
Only SPKR out is 8 ohms......two caps in series will not match low to medium
Z....only a xfmr will do that....

For consumer line to PRO connection, you can do this:
tie consumer ground to Pro shield.....
tie consumer high to either PRO + or - input...
leave remaining input floating....do NOT ground or tie to other input (this
will be close and give you a good enough range to work with)..

Chris
(WB5ITT)

"WShoots1" wrote in message
...
Allegedly two 470 mfd caps in series will match 8 ohms to 600 ohms.

Shack has an 8 ohm to 1000 ohm c.t. transformer that could work, too. Just
pick
off half the 1000 ohm side.

Bill, K5BY
SE Texas

Chris: Consumer impedance is HI Z (10-20K) not 8 ohms...

Ah so... I misunderstood that part. Further:

I was wondering about that series cap thing myself. I've been retired for a
dozen years but it didn't look right. I expected a network with different
values at each port. But I recalled it being a suggestion from Hamilton, the
maker of the Rangemaster AM1000, a Part 15 AM transmitter.

The Radio Shack transformer was my own suggestion (now moot) to the fellow,
whom I recall asking about matching a CD player to a line input.

Even in my old age, I need to resume checking other people's suggestions myself
before recommending them to anyone else. (Sigh...)

Bill,
K5BY

In article , WShoots1 wrote:
The Radio Shack transformer was my own suggestion (now moot) to the fellow,
whom I recall asking about matching a CD player to a line input.

A step-up transformer IS one way of approaching the problem. It gets you
voltage gain at the expense of current loss, and if you are going into
a modern high-Z balanced input so you don't need to drive a 600 ohm load,
it's a good way to go. BUT, good transformers are expensive and cost a
good bit more than the electronic bump boxes.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."

The Rolls box sounds adequate. Guitar Center (great place to get pro
audio stuff)??

What I do in a pinch is Consumer + to Balanced +; Consumer Shield to
Balanced -.

On 27 Nov 2004 23:45:58 GMT, "CWB"
wrote:

Consumer impedance is HI Z (10-20K) not 8 ohms...
Only SPKR out is 8 ohms......two caps in series will not match low to medium
Z....only a xfmr will do that....

For consumer line to PRO connection, you can do this:
tie consumer ground to Pro shield.....
tie consumer high to either PRO + or - input...
leave remaining input floating....do NOT ground or tie to other input (this
will be close and give you a good enough range to work with)..

Chris
(WB5ITT)

"WShoots1" wrote in message
...
Allegedly two 470 mfd caps in series will match 8 ohms to 600 ohms.

Shack has an 8 ohm to 1000 ohm c.t. transformer that could work, too. Just
pick
off half the 1000 ohm side.

Bill, K5BY
SE Texas