Toshiba SY-504 CD-4 System Disc 4-Channel Demodulator up for sale

Help Support QuadraphonicQuad:

bigbillquad

QQ Lifetime Supporter
QQ Lifetime Supporter
QQ Supporter
Joined
Dec 6, 2010
Messages
1,456
Location
New Zealand . Waitakere
Hi. All

Another item on ...JAUCE AUCTION...Toshiba SY-504 CD-4 System Disc 4-Channel Demodulator if anybody`s interested , it`s going for 1000 yen. about $9.10 us. at the moment, about 4 days to go..
BBQ...

( https://www.jauce.com/auction/l686282892 )

i-img1200x900-16262490347nkdfg38610.jpg

i-img1200x900-1626249034ntowqc36604.jpg
i-img1200x900-1626249034r3rd8s11158.jpg

i-img1200x900-1626249034j1t7ra39566.jpg
 
Last edited:

Sonik Wiz

2K Club - QQ Super Nova
QQ Supporter
Joined
May 30, 2005
Messages
2,513
Location
Kansas City
Hi. All

Another item on ...JAUCE AUCTION...Toshiba SY-504 CD-4 System Disc 4-Channel Demodulator if anybody`s interested , it`s going for 1000 yen. about $9.10 us. at the moment, about 4 days to go..
BBQ...

( https://www.jauce.com/auction/l686282892 )

View attachment 69036
View attachment 69037View attachment 69038
View attachment 69039
Speaking of Toshiba.....
Have you ever checked that Toshiba SC-410
QM-unit from a while back? Would love to hear your experience with it.
 

surround.sound.enthusiast

500 Club - QQ All-Star
Joined
Mar 25, 2014
Messages
504
Location
Massachusetts
Hi. All

Another item on ...JAUCE AUCTION...Toshiba SY-504 CD-4 System Disc 4-Channel Demodulator if anybody`s interested , it`s going for 1000 yen. about $9.10 us. at the moment, about 4 days to go..
BBQ...
There we go, m'man BBQ found this unit too! It ended up selling for about 252 USD with what appears to have been quite a competition of 24 bids.
 

surround.sound.enthusiast

500 Club - QQ All-Star
Joined
Mar 25, 2014
Messages
504
Location
Massachusetts
That's my same question in my post for this auction. I'm young enough to never have heard of either a condenser cartridge, or a ceramic cartridge like we were talking about in the SH-3480 thread for that matter. I've heard that osmium and sapphire were used as cheaper solutions to diamond, but these two types/nomenclature are new to me. " 'Scuse me while I wipe some of this water out from behind my ears."
 

Soundfield

1K Club - QQ Shooting Star
Joined
Dec 29, 2011
Messages
1,375
Location
Essex, UK
Is a condenser cart like an sc cart?
No. The condenser cartridge uses a transducer similar to an electret microphone. The semiconductor cartridge uses a strain gauge. They are not interchangeable, they have different performance characteristics and different electrical interfaces.
 

Doug G.

2K Club - QQ Super Nova
Joined
Jul 8, 2007
Messages
2,026
Location
Austin, Minnesota
Yes, an electret material pretty much works like a condenser microphone except it doesn't need polarization. Its output varies by being flexed/vibrated and the capacitance varying along with it. When I worked for Telex, the hearing aid division used them in a product where a teacher would wear a transmitter and the hard-of-hearing students would wear the receivers, thus enabling them to amplify the teacher's words. The electret microphones are just small cylinders and can be installed in limited space applications.

A strain gauge changes its resistance when flexed/vibrated and so, if a current flows through it, the change in resistance modulates the current flow. It's kind of a variable resistor without a wiper, as it were.

Doug
 

furui_suterioo

500 Club - QQ All-Star
Joined
Sep 5, 2018
Messages
513
Location
kgLoks Agenjegleks, gCagliforgnjiga

Doug G.

2K Club - QQ Super Nova
Joined
Jul 8, 2007
Messages
2,026
Location
Austin, Minnesota
I wish my SE-405 and SH-400 had master volume controls since recording levels on records aren't exactly consistent.

It really wouldn't be difficult to add that feature and if I were younger, I would probably do it but, with my eyesight and dexterity degradation at my age, I would hesitate.

Doug
 

surround.sound.enthusiast

500 Club - QQ All-Star
Joined
Mar 25, 2014
Messages
504
Location
Massachusetts
I wish my SE-405 and SH-400 had master volume controls since recording levels on records aren't exactly consistent.

Doug
Yes, having at least a master volume control on any demodulator or decoder is very handy. Although the volume on my Sansui QS-D1000 is quieter than any other outboard unit I have, even when it's at maximum. So not all volume controls are made equal(!).
 
Top