phil@ux1.cso.uiuc.edu (Phil Howard KA9WGN) (02/20/91)
I am wanting to connect a tape recorder that has only MIC input to a device that has AUX or earphone or speaker level outputs. What I need is some level of attenuation. I have not worked with these before so I don't know what the typical levels and impedances are. Does anyone know this and/or have good working circuits for apply the proper attenuation? Are there any other things that need to be done besides just attenuation? The recorder I have is a Sony TCM-38V. The instructions recommend using special connector cords for recording from various sources. For dubbing between 2 cassette units they recommend model RK-G64. The same is also recommended for recording from a radio or TV equipped with an earphone jack. The RK-G69 is recommended for recoding from a radio or TV equipped with a recording jack. I suspect what I need to do is reproduce these cords unless some wonderful dealer happens to stock these possibly rare items. (Maybe RS? Nah!) Email: phil-howard@uiuc.edu or ka9wgn@uiuc.edu Thanks. -- --Phil Howard, KA9WGN-- | Individual CHOICE is fundamental to a free society <phil@ux1.cso.uiuc.edu> | no matter what the particular issue is all about.
bill@bilver.uucp (Bill Vermillion) (02/20/91)
In article <1991Feb19.220209.13013@ux1.cso.uiuc.edu> phil@ux1.cso.uiuc.edu (Phil Howard KA9WGN) writes: >I am wanting to connect a tape recorder that has only MIC input to a device >that has AUX or earphone or speaker level outputs. ... > I suspect what I need to do is reproduce these >cords unless some wonderful dealer happens to stock these possibly rare >items. (Maybe RS? Nah!) Well, maybe RS is the place. A few years ago they did have a cable made especially for that purpose. It had built in attenuation so that you could take a high level signal and feed it into a mike input. -- Bill Vermillion - UUCP: uunet!tarpit!bilver!bill : bill@bilver.UUCP
smithj@hpsad.HP.COM (Jim Smith) (02/22/91)
Actually, Radio Shack DOES sell a cord that may do the trick for you.
From the 1990 catalog p.29:
Dubbing Cords
Attenuating with 1/8" plugs. 6.5 ft. #42-2152 $3.39
Otherwise, it's pretty easy to make an audio attenuator. Perhaps the easiest
thing is to stick a volume pot (10 kohm - 100 kohm, somewhere in about that
range ought to do, taper doesn't really matter) in a metal box with a couple
of appropriate jacks (or shielded cables with plugs, if you wish), in the
following configuration:
signal in>----------|
/
pot \
/
\<-----------------<signal out
/
\
shield (ground) /
in >----------------|-------------------> shield out
and then adjust the pot until you get no distortion at the input of your
mixer.
You could also use a pair of fixed resistors instead of the pot, say, 20k
to the signal in and 1k to ground should give you enough attenuation. But
the pot is better, because you can adjust it to the right amount of atten.
-jimIO80900@MAINE.BITNET (02/22/91)
I have not looked for such a connector recently, but a few years ago Radio Shack sold such a connector. They came in packages of two, and accepted an RCA jack, and the out was a MIC jack (1/8", I think). I cannot remember off hand, but I believe the attenuation level was about 22 dB. C. A. Gagnon IO80900 at MAINE.BITNET io80900@maine.maine.edu
techie@public.BTR.COM (Bob Vaughan techie@btr.com) (02/26/91)
In article <91052.182311IO80900@MAINE.BITNET> IO80900@MAINE.BITNET writes: >I have not looked for such a connector recently, but a few years ago >Radio Shack sold such a connector. They came in packages of two, and >accepted an RCA jack, and the out was a MIC jack (1/8", I think). I >cannot remember off hand, but I believe the attenuation level was about >22 dB. They still do. "Dubbing cords" page 106 of the 1991 catalog Part # 42-2152 1/8"plug - 1/8"plug attenuating part # 42-2461 1/8"plug - RCA plug attenuating????? Standard Disclaimers Apply -- Welcome My Son, Welcome To The Machine Bob Vaughan - techie@well.sf.ca.us {apple,pacbell,hplabs,ucbvax}!well!techie 1-415-856-8025 - techie@btr.com {fernwood,decwrl,mips,sgi}!btr!techie I am me, I am only me, and no one else is me. What could be simpler?