"Going the other way, from a mono amplifier to a stereo headset, is not a problem"
Well, this can be a problem too. It all depends. From a mono amplifier to a stereo headset you are shorting the two audio loads (speakers) together to make one. There are two ways to make this: Serial or parallel. If the two loads are combined in a parallel way, the total impedance of the load is less than the lowest one (if both are equal, then the resultant load is half the original value). In this condition, with an impedance load of a half the original value, you are forcing two times the nominal current from the mono amplifier. The correct way to solve this problem is by knowing which is the nominal load the amplifier is designed to work for (this is an amplifier specification), and then by knowing which is the impedance of the load you are going to plug into the amplifier (headset / speaker impedance), this should be a headset/ speaker specification. If not spec is available, the correct way is by measuring that impedance, but that is another story. Perhaps for those who do not have skills in electronics, the best way is to contact and ask the radio manufacturer or vendor. Best regards Daniel Arditi Ercoupe Argentina ________________________________ From: John Cooper <[email protected]> To: [email protected] Sent: Sat, June 26, 2010 10:09:33 AM Subject: Re: [ercoupe-tech] Re: Not entirely Ercoupe related On 6/25/2010 10:01 PM, Ed Burkhead wrote: http://www.radiosha ck.com/product/ index.jsp? productId= 2103725 might just do it for you.Maybe nothing to worry about but... If you are "jacking" a stereo output into a mono headset, you are shorting the two audio amplifier outputs together to make one. Without some sort of loading, this could be problematic. I suggest you contact Sigtronics and see what they have to say on the subject first... (Going the other way, from a mono amplifier to a stereo headset, is not a problem.) -- John Cooper Skyport East www.skyportservices .net
