TS-950sdx - Line Level ACC2 Audio Mod
Posted: Mon Feb 14, 2011 9:31 pm
Howdy Y'all,
We have had allot of questions about feeding Line Level Audio into the TS-950sdx ACC2 connector.
The main question was if there was a capacitor that you have to change out like on the TS-870.
Here is the answer:
Yes, you can input Line Level Audio into the ACC2 Connector, but it will roll off your Low Frequencies due to several low value (.1uf) coupling capacitors.
The C131 Mod for the TS-870 only changes one capacitor as that is all there is.
You will have to change out 2 capacitors on the TS-950sdx to accomplish the same thing.
You can install electrolytic caps, but we don't recommend them.
The best thing to install would be replacement XR7 Ceramic Chip caps in an 805 case in a 1uf value.
The caps to change would be C154 & C158 on the IF Unit. Change these to 1uf.
There is also another capacitor if you think you are not passing enough lows once changing C154 & C158.
This is capacitor C161, it is a 1uf. You would want to change this capacitor to a 4.7uf.
We think that just changing out C154 & C158 should be enough.
Here are some pictures of the capacitors on the IF Unit:
We haven't done this mod here, so there is no test data to tell you how much more Low Frequency you will get.
It should be quite allot more.
The Pins for the Line Level Audio input are Pins 11 and 12 (11 being the audio and 12 being the ground) and pins 9 and 8 for the PTT. The reason for the PTT is the audio is separate from the front so you need this separate ptt. (These pinouts are on page 20 of your SDX owners manual).
Hope this helps, let us all know how it works out for ya!
Take Care,
We have had allot of questions about feeding Line Level Audio into the TS-950sdx ACC2 connector.
The main question was if there was a capacitor that you have to change out like on the TS-870.
Here is the answer:
Yes, you can input Line Level Audio into the ACC2 Connector, but it will roll off your Low Frequencies due to several low value (.1uf) coupling capacitors.
The C131 Mod for the TS-870 only changes one capacitor as that is all there is.
You will have to change out 2 capacitors on the TS-950sdx to accomplish the same thing.
You can install electrolytic caps, but we don't recommend them.
The best thing to install would be replacement XR7 Ceramic Chip caps in an 805 case in a 1uf value.
The caps to change would be C154 & C158 on the IF Unit. Change these to 1uf.
There is also another capacitor if you think you are not passing enough lows once changing C154 & C158.
This is capacitor C161, it is a 1uf. You would want to change this capacitor to a 4.7uf.
We think that just changing out C154 & C158 should be enough.
Here are some pictures of the capacitors on the IF Unit:
We haven't done this mod here, so there is no test data to tell you how much more Low Frequency you will get.
It should be quite allot more.
The Pins for the Line Level Audio input are Pins 11 and 12 (11 being the audio and 12 being the ground) and pins 9 and 8 for the PTT. The reason for the PTT is the audio is separate from the front so you need this separate ptt. (These pinouts are on page 20 of your SDX owners manual).
Hope this helps, let us all know how it works out for ya!
Take Care,