"Eric S." wrote in message
...

I've been eagerly following the long-ongoing discussion on building a
high-quality AM tube tuner which would excel at both sensitivity and
audio fidelity.


** Has anyone ever mentioned the Aussie built Audiosound "AM100" tube
AM tuner ?? Designed for local conditions where AM is of wide audio
bandwidth and not crowded with interfering signals.

The design uses just three tubes, a 6N8, a 6AN7 and an EM84 tuning
indicator. The PSU uses diodes and the detector is a biased germanium diode
operating at high level to reduce THD to under 1% at full modulation.

There is a balanced loop antenna which dramatically reduces atmospheric
and most man made noises plus a passive ( LC type ) notch filter to sharply
knock out 9 kHz and above for night time listening.

IME long distance AM is possible but in no way is it hi-fi quality -
however with a large enough loop it is just possible to hear signals from
New Zealand in Sydney on the set.




......... Phil