Having just read some of these posts, I just did a few tests on my MFJ-1025. (bought mine second-hand very cheap - a lot of people buy these thinking they will get rid of any noise!)
I modified it to become a 1026 . . . you definitely need the extra pre-amp for the "Noise Antenna", especially on 160m - fortunately they use the same PCB for both versions, so you can easily add their extra preamp circuit design on the PCB. I normally only use mine on 160m . . . but just did a test on 15m & 10m . . . it adds no noticeable noise whatsoever ! So I think the OP's must be faulty . . perhaps powering it by a noisy PSU? Roger G3YRO _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
