Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12, 2025) x

Thread Closed

Sylvania Speakers: One tests roughly 8 ohms, the other 23?
#1

I picked up a pair of 70's Sylvania speakers today for $20 at the local flea market. Although they aren't in prefect condition, the will still pair well with my dumpster find Realistic. Both speakers are supposed to be 8 ohms, which is perfect for about any 70s or even 60's stereo. They also have two ways to hook up, either RCA connector or two screw terminals on a removable panel on the back. I ohm checked both speakers on the terminals first and one came to 8.1 and the other 7.8/7.9, close enough! I did the same on the RCA connectors and this is where it got funky. The speaker that rated 7.8/7.9 stayed the same, while the other came up at 22-23 ohms each time I checked. Took some fine grained sand paper and cleaned the connectors,  but still get the same. I pulled the little cover and can see two Mallory capacitors, a resistor, and a choke all connected right to the connectors and cover. Everything runs through the same components, so what gives? Icon_crazy Note: The issue only happens through the RCA connector.

No matter where you go, there you are.


Messages In This Thread
Sylvania Speakers: One tests roughly 8 ohms, the other 23? - by Jayce - 06-30-2018, 04:18 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
54C Complete Teardown/Rebuild
Hello Roy, here is this one sincerely Richardradiorich — 12:45 AM
54C Complete Teardown/Rebuild
Richard, Had grabbed it already but thank you just the same.  I find myself wanting to find some way to block out the...glyphmon — 12:03 AM
54C Complete Teardown/Rebuild
Hello roy, here is a link to the schematic . Sincerely Richardradiorich — 11:54 PM
54C Complete Teardown/Rebuild
Richard, The Silvertone 2014 also is a transformerless set, so I am incorporating a 1:1 600 ohm audio isolation transfo...glyphmon — 11:37 PM
Preliminary work on wife's Silvertone 2014
Did an alignment today which was interesting.  IF alignment went great, almost all was already spot-on.  Adjusting on th...glyphmon — 11:35 PM
54C Complete Teardown/Rebuild
The main problem with adding a Bluetooth input is that this set lacks a traditional power transformer to isolate it from...radiorich — 11:19 PM
54C Cabinet Refinish
I started stripping this cabinet before it got super chilly out because I knew I wasn't going to be able to work on ...glyphmon — 11:18 PM
54C Complete Teardown/Rebuild
While I'm waiting to wrap up the final steps on my wife's Silvertone 2014, I started disassembly on the next project.  O...glyphmon — 11:07 PM
Preliminary work on wife's Silvertone 2014
Hello roy, that great news glad it worked out for you !! Sincerely Richardradiorich — 10:50 PM
Preliminary work on wife's Silvertone 2014
Safety caps arrived today.  Soldered one in and had a successful first power-up.  No magic smoke escaped and it tunes in...glyphmon — 09:53 PM

[-]
Who's Online
There are currently no members online.

>