EELA S25 REPORTOHONE TECHNICAL INFORMATION:

This information is not in the user manual!

 

NOKIA HDC5 and HS47 Cable

We found that there are different Nokia telephones using the same connector but with different wiring.
The 1100 series, 1600 series and HS47 series  requires a slightly different cables than the older HDC5.
With the standard HDC5 cable these telephones are not recognised by the S25 reportophone.
We do offer a special cables for these telephones, for details see price list.
If you need to convert these cables please contact us.

Important information on NiMH batteries and built-in charger


Always discharge new or really empty batteries before use!
A full discharge / charging cycle will take between 7 - 8 hours for 2000 mAh batteries.
A full charge of 2000 mAh batteries as supplied will allow you the use of minimum of 10 hours.
(We have tested these with high level music on headphones for up to 18 hours)

How to get the most out of a set of rechargeable NiMH batteries:
Download pdf file here


Disable the auto-off function:

Pictures how to disable the auto shut off function. The standard versions of the unit will shut off automatically if not active for approx. 10 minutes. The timer circuit will retrigger if the input level reaches a level between the 2 green LEDs of the level display. If the input level stays below that threshold for approx. 10 minutes the unit will shut down to preserve battery power.
You can disable this function by soldering 2 points together.

Also learn how to use the unit as a stationary hybrid (V2 only, SN < 0100).

Download the pdf file here.

 

 

HF screening against radiation of the mobile telephone:

The S25 is built with this in mind. The aluminium case is chromium plated on the inside and outside thus forming a Faraday cage.
When opening the unit, make sure that you re-establish the contact between the cover and base unit upon assembling. This is done with the 4 screws holding the top cover. Also the connectors on the back must have an electrical connection to the base unit.

The input electronics are specially designed to eliminate the typical radiation noise of the telephone. Always use a symmetric, screened signal cable for the microphone and make sure the screening is connected to pin 1 on both sides. We also found that there is a huge difference between various types of microphones. Popular reporter microphones like the Sennheiser MD21 or MD42 are good as well as the Beyer Dynamic M58 Reporter microphone.

 

 

 Last update: July 2008

 http://www.eela-audio.com/S25TI