the resistors are 1/4 watt, so the size is almost always in direct correlation
to the wattage.
The capacitor size isn't the real issue. You should shoot for a voltage
handling of 50V to200V.
________________________________
From: M100 <[email protected]> on behalf of Will Senn
<[email protected]>
Sent: Wednesday, October 12, 2022 10:19 PM
To: [email protected] <[email protected]>
Subject: Re: [M100] Will any old Cassette recorder work?
I am finally coming back around to this, in the absence of other stuff to look
into... So, I read, reread, and read some more about doing the cassette stuff.
Apparently, I need a cable :). Thanks for the detailed pdf. I have a scenario
and some questions based on the reading.
I have a Califone 3132AV Cassette Recorder. It's a classroom model - which
means it's LOUD (as in massively amplified speaker output) and it has 4, 1/4"
headphone jacks. Related to the TRS-80 5 pin din to whatever cable, it looks
like I will need 5 pin male din in the 180 configuration on the m100 side and
three jacks (3.5mm, 2.5mm, and 1/4") on the Califone side which has a 3.5mm mic
input, 2.5mm rem input, 1/4" headphone output. But... apparently, it's not wise
(or useable) to plug in the 3.5mm line out (aux) coming from the m100, cuz
that's at line level (1 volt stuff) vs the mic which is expecting much smaller
voltages... So, I need a pad?/attenuator to tamp down those high voltages. If I
read your email correctly, this is the 2 resistors and a capacitor circuit. How
do I know what size to make them?
Here is what I think I need (hopefully, fixed font will display properly):
/- 3.5mm mono jack -> Attenuator Circuit ->
MIC \
M100 <- 5 pin 180 Male DIN <- -- 2.5mm mono jack -> REM
- Califone 3132 AV
\- 1/4" mono headphone jack -> HP/EXT SPKR
/
If this is correct. I just need some assist on that Attenuator Circuit...
Thanks,
Will
On 10/1/22 4:14 PM, you got me wrote:
I make my own cables.
Including ones that allow you to select if the output is going to a MIC or
LINE/AUX. It includes an impedance matching circuit consisting of two resistors
and a capacitor. This effectively attenuates the signal to that of a 'condenser
mic' when needed.
This advanced cable also has an audio isolation transformer which helps to
eliminate noise between the m100 and the recording device.
I've only made three that have a Bluetooth connection so that you can transfer
files to the m100. Recording from the m100 to a smart phone can be a problem
depending on the phone. The phone must have the capability to record via a
Bluetooth microphone.
________________________________
From: M100
<[email protected]><mailto:[email protected]>
on behalf of Will Senn <[email protected]><mailto:[email protected]>
Sent: Saturday, October 1, 2022 9:06 PM
To: [email protected]<mailto:[email protected]>
<[email protected]><mailto:[email protected]>
Subject: Re: [M100] Will any old Cassette recorder work?
Nice. Did you make your own cable or buy a premade one?
Sent from my iPhone
On Oct 1, 2022, at 4:01 PM, you got me
<[email protected]<mailto:[email protected]>> wrote:
just about any audio recording device will work. However.....
some common problems are associated with recording a program (output of the
computer). Ideally, the recorder should have a LINE INPUT for this. An AUX
INPUT will usually do, but there will be an impedance mismatch when using a MIC
INPUT. The LINE and AUX are designed for really strong signals. The MIC input
is designed for weak, or unamplified signals. This is like taking a watermelon
and trying to fit it into a shot glass. You might get lucky if your recording
device allows you to manually set the recording level. Some units do this via
the volume switch (effectively it serves two purposes). But some units don't
have that feature.
I have been able to do program recordings and playbacks using mini cassettes,
mini discs, a Tascam portable digital recorder, etc.
________________________________
From: M100
<[email protected]<mailto:[email protected]>>
on behalf of Will Senn <[email protected]<mailto:[email protected]>>
Sent: Saturday, October 1, 2022 8:21 PM
To: [email protected]<mailto:[email protected]>
<[email protected]<mailto:[email protected]>>
Subject: [M100] Will any old Cassette recorder work?
Has anyone recently done tape stuff? What's your setup? I have a Califone 3230
AV recorder with motor control, aux etc. Will that work, or would I need a
Radio Shack branded setup?
Thanks,
Will
