• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

Sherwood Micro CPU 100 Tuner

V

vagabondjoe

New Member
Hi

I found a Sherwood Micro CPU 100 Tuner and from reading the manual that I found online. it seems I need an amplifier.

When I first hooked it up, I foolishly connected the speakers to the Variable Output, and received a weak output volume.

I also have a Sansui RG-707 Graphic Equalizer Consolette; the connections are

(here is a graph, the Os are the connections)

Line

Source In Mixing Out
Left O O
Rght O O


Question - Can I connect the Sherwood from the Variable Output to the Sansui Source In, and the Speakers to the Mixing Out?

Or can you suggest an inexpensive amplifier?

thanks

If this doesn't work, I don't know to do with either of 'em.
 
Register to hide this ad
That's an interesting question, since equalizers do raise the level of the signal when the slider's above 'zero': but it would still be pretty weak.

You need an 'integrated amp'. That's an amplifier that has tone, volume and source ("tuner," "phono," "aux") controls, as opposed to a 'power amp' that is usually just a plain box with a power switch.

You might want to consider a small Realistic integrated like the SA-150, which is usually found on eBay for $20-$40 and is also 'micro' sized. There's some discussion of it here: http://www.audiokarma.org/forums/showthread.php?t=77020

You may need more power depending on what kind of speakers you have; if so there are a lot of small integrateds around with more oomph.

Oh, and welcome to AK!
 
It's a tuner (OEM Draco, and quite 'high-end' for it's time); you can connect it to the line level (CD, AUX, TAPE PLAY, TUNER, etc.) input on any piece of stereo/hifi/audio equipment (even a boombox if it has an AUX input). If it has a variable output level, you can even hook it direct to line level inputs on amplified speakers or a power amp.
 
Thanks for all your input, folks.

Here is what I have ...

DSC01962.JPG


the power is on but nothing is connected.

This is the back, from the receiver Variable Output, to the Sansui Equalizer Line In, and from the Equalizer Mixing Out to the Speakers.

DSC01942.JPG


Before I plug in the power and turn it on, I need to know if this is OK, or will it damage the system?

Also, the Equalizer says Power 15 Watts Rated, on the right, and at one time I connected an electric guitar to it, I just don't know how it was hooked up.

Would this act as an amplifier, 15 watts would be sufficient, I just want to see if the components work.

thanks again

PS

OK, I was searching the house and low and behold, I found a Velodyne VRP Series Model 12 subwoofer.

It has a Line Input, volume control, and speaker connections.

Can I connect this to the receiver and/or the Equalizer?


BTW

I hope the pictures aren't too big.
 
The 15W is the power consumption of the EQ and not it's output power.

You will need an amplifier. No, the sub won't do because they usually cut the higher frequencies (more than ~100Hz?) and you'll be missing a good chunk of music (10Hz to 22 000Hz).

Additionally the impedance of the speakers could cause some transistors to blow out because they weren't meant to drive speakers. In the mean time you could use powered computer speakers for background music until you can afford a proper amplifier.


Hope that helps.
 
Do not dump out of the tuner as it is well respected and rare though not a high resale item. Sounds like you are a real newbie; nice to start near the top with at least 1 component. Congrats on getting it. Add to your list an antenna.
 
Yes, I am a newbie, to not only older models, but new models.

My brothers and I installed a surround sound system in his living room with a new Yamaha system and were trying to install it to the Velodyne, but seems as if new tech is not compatible with old tech.

We made a project out of it.

The origin of the Sherwood, is that I came across it when cleaning out a house that had been foreclosed.

I also found a Pioneer SX 550.

This Sherwood was the first receiver that incorporated ICs

http://www.fmtunerinfo.com/Sherwood.pdf

Original list price, $2000.

I saw it on auction for about $500.

This system was lying around for a while, so it picked up a lot of dust.

I will keep for a while, and I do have a Archer Model 15-1113B FM amplifier, although I haven't connected it.
 
Hey, the missing piece of the puzzle. Go from the output of the tuner to the AUX input of the Pioneer and hook the speakers to the speaker terminals of the Pioneer. Make sure the volume on the Pioneer is down and the tape/source switch is in the source position and the function switch in in the AUX position. Turn it all on and provided everything is working you'll have your answer and problem solved.

As for the equalizer, you can patch it into the tape rec and play jacks on the Pioneer and put the tape/source swich and put it into the tape position and it should work.

FWIW, I'm not sure that I'd claim the Micro 100 was the first tuner to use ICs. Sherwood in its later version of the S3300 SS tuner used what it called a microcircuit. It looked like a transistor but has more leads. These morphed into the IC package as we know it today. I'm not sure if Sherwood was the first to use the microcircuit. It was also used in the SEL-300 tuner that predates the Micro 100 and the SEL-200 receiver that used the tuner from the SEL-300 sans the digital readout.
 
Thanks Brian, your scheme worked.

Connecting the Sherwood to the Pioneer AUX makes the Sherwood work.

If I push in the Pioneer FM Muting button, that turns on the Pioneer.

Connecting the Pioneer Tape 1 Play, to the Sansui Tape Rec, and pushing the Pioneer Tape Monitor 1 button, makes the Sansui equalizer act like a amp for the electric guitar.

IMG0220.JPG


As for the antenna, I used a Cat 5 wire at the 300 ohm, that did the job.

The Archer FM amplifier gave a weaker signal for all the stations.
Although, I did connect it to the CATV line, as opposed to an outdoor antenna.

Next on the to do list, connect the receiver to psb speakers, and see if it can connect to a Toshiba Theaterwide HD projection TV.
 
My pleasure. You have a really nice tuner and even better that it works. Now you only need the matching amp and you'll have a killer system though the Pioneer ain't nothing to sneeze at.
 
You must log in or register to reply here.
Back
Top Bottom