modification Optimod 8100A

[djfa94]

That's a very great idea !!

Some tips :

A- For a Bass Boost, on card #3 & #4 replace R309 with a 1k resistor, R318 with a 6.81k res. and R319 with a 68.1k resistor. You need to remove R317. Listen to this mod, if you want to improve it, you can add in parallel with C304 a 22nF capacitor and the same with C305.

B- On card #5 you can change the threshold of the bass clipper with R545 and R546.

C- On card #5 : Jumper A change the release time of the principal band : normal or slow
Jumper B decrease the threshold of the two band processing by 5db
Jumper C change the principal band attack

Hope Bob will confirm the function of those jumpers, and give us some feedback.

Hope you'll understand, my english is not very good...

Seb.

PS: I'm looking for a card #0 kit.

Thx, who try this ?

 

[felixperu]

Hello all,
I am new here, I am not sure if this is the right place for this.
I would like to find any idea or suggestions.
Back in 1985 I worked on a radio station in Lima Peru, this was a very small private radio, BUT it has one of the best audio sound, the radio was using Orban Optimod 8100a with the XT2 EQ ONLY, I now the engineer made some adjustment or modification to the Orban to get this very good sound, (More mid range metallic sound).
After 32 years I own an Orban 8100 with the XT2,
I would like to copy the same quality of audio from this station,
The radio is in Tune in under South America, Peru, Lima, the name is Telestereo, IF amy one had some time, CAN you PLEASE leasing to this Radio and guide me.
Please
I am in Arizona US.
Thank you very much to all
Felix

 

[djfa94]

 

[davideduardo]

Hello all,
I am new here, I am not sure if this is the right place for this.
I would like to find any idea or suggestions.
Back in 1985 I worked on a radio station in Lima Peru, this was a very small private radio, BUT it has one of the best audio sound, the radio was using Orban Optimod 8100a with the XT2 EQ ONLY, I now the engineer made some adjustment or modification to the Orban to get this very good sound, (More mid range metallic sound).
After 32 years I own an Orban 8100 with the XT2,
I would like to copy the same quality of audio from this station,
The radio is in Tune in under South America, Peru, Lima, the name is Telestereo, IF amy one had some time, CAN you PLEASE leasing to this Radio and guide me.
Please
I am in Arizona US.
Thank you very much to all
Felix

The first question is whether their stream uses the same processing as the over the air signal. In many cases today, the stream is separately processed.

Interestingly, back in 1983 I had to fix an Optimod at Omega, the instrumental music station of the Archdiocese. Someone had mislabeled the cables from the studio to the roof where the processor was and put 220 volts on the audio input. I spent a day running around Lima looking for a way to recreate the precision resistor circuit at the input to the Optimod. We got it to work with consumer electronics type "equivalents".

I was there to start up the stations new music format, so that was a strange distraction.

 

[Groove1670]

I'm currently using a 8100A/XT2 combo and it sounds great. Make sure audio is .wav files (we use mp3 320k for commercials). Add a compellor in front of your STL's.

I've heard 14k processors with terrible audio because material was awful. Remember garbage in garbage out.

Make sure your Optimod components are recapped and alligned. Will last another 2 decades.