| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 2707.1 | Do it yourself... | CSC32::MOLLER | Fix it before it breaks | Tue Aug 27 1991 14:09 | 37 |
|
Using Radio Shack parts. this should set you back about $5.00
47k
+------/\/\-------+
| |
| |\ |V+ |
In + 10uf 47k | | \ | |
0-----||---+-----/\/\--+--| - \ |
| | \ | + 10 uf
>- gnd | | >-----+--||----0 out
/ | /
\ 1 meg +---| + / gnd -->
/ | | / |
\ / |/ |V-
| \ 47k
gnd /
\
|
gnd
Use the TLO82 chip (2 op amp's per 8 pin chip) & make 2. You could use
2 9 volt batteries to drive this:
gnd
|
+ ------+ +---+---+ +------ -
| | | |
+ - + -
9V 9V
It's a very simple unity gain inverter with about 50K input
impeadance.
|
| 2707.2 | | HEART::MACHIN | | Wed Aug 28 1991 07:04 | 10 |
|
Thank you -- just what I needed. I'm not at all handy
with a soldering-iron, but for a fiver I reckon it's worth
a go.
Incidentally, could you stick a variablr resistor in here
somewhee to vary the phase shift a bit either side?
Richard. (ready to get his fingers burnt)
|
| 2707.3 | | RGB::ROST | Fart Fig Newton | Wed Aug 28 1991 08:45 | 10 |
| Re: .2
No, you can't vary the phase shift, it's a solid 180 degrees.
BTW, for those using balanced XLR lines, you can get 180 degree phase
shifting by simply reversing the connections to pins 1 and 2 on the
cable, no circuit needed.
Brian
|
| 2707.4 | | HEART::MACHIN | | Tue Sep 03 1991 07:23 | 8 |
|
Many thanks for the diagram -- it works fine!
And the pound-sterling cost was LESS THAN THE DOLLAR
COST (i.e. 3.40). Is this a record? (No -- just a phjase-inverter).
Richard.
|
| 2707.5 | | KERNEL::IMBIERSKI | | Thu Sep 05 1991 05:25 | 9 |
| >> And the pound-sterling cost was LESS THAN THE DOLLAR
>> COST
Isn't this is what you'd expect, Richard?
�1 = $1-and-something
Tony
|
| 2707.6 | | HEART::MACHIN | | Thu Sep 05 1991 07:25 | 6 |
|
Well, it was just that with every other piece of electronic
music gadgetry I've bought, pound = dollar or less.
Richard.
|
| 2707.7 | | QUIVER::PICKETT | David - Live free or live in Mass. | Thu Sep 05 1991 15:20 | 5 |
| From our end: pounds = 1.6(dollars) The conversion changes daily. The
1.6 is a rough approximation of recent exchange rates.
dp
|