New antenna and amplifier

[pjm]

The Elad preamp is fitted with a relay which bypasses the amplifier when the DC is removed. The amplifier may be faulty

That would explain it, the Antenna is higher than my old one which accounts for the better signal reception when the amp is bypassed.

Not looking good for the pre-amp :(

[neroon79]

It is nearly impossible, that a switching mode power supply would generate 1090MHz harmonics by itself, because they usually use switching frequencies of about 50kHz up to 160 kHz. This is more ore less 5000 times lower as the 1090Mhz. At 1090Mhz the PSU harmonics shall be as high as the noise itself.

[Deadcalm]

I had a problem with my Elad pre-amp last year.  It was supplied by Wimo, and they arranged for it to be replaced.  In the meantime I purchased a Kuhne pre-amp and Bias-T, which has been running faultlessly ever since - the Elad is now my hot spare...

DC

[neroon79]

I had a problem with my Elad pre-amp last year.  It was supplied by Wimo, and they arranged for it to be replaced.  In the meantime I purchased a Kuhne pre-amp and Bias-T, which has been running faultlessly ever since - the Elad is now my hot spare...

DC

Thank you for the intel!