In article ,
Jon Noring wrote:
Well, being the "OP", I want a high-audio performance, modern design
AM tuner to integrate into my audio system -- and I believe a lot of
tube-o-philes likewise want that -- but not everyone obviously. There
are several reasons why most higher-grade audio systems use separate
components, the reasons of which are obvious to most everyone. The AM
tuner is no different than other audio components in this regard.

Maybe what you want is the old JW Miller passive AM tuner. No
active devices at all, just a bunch of tuned circuits and a detector
diode.

Mark Zenier Washington State resident

wrote:
Jon Noring wrote:

Well, being the "OP", I want a high-audio performance, modern
design AM tuner to integrate into my audio system -- and I believe
a lot of tube-o-philes likewise want that -- but not everyone
obviously. There are several reasons why most higher-grade audio
systems use separate components, the reasons of which are obvious
to most everyone. The AM tuner is no different than other audio
components in this regard.

Maybe what you want is the old JW Miller passive AM tuner. No
active devices at all, just a bunch of tuned circuits and a detector
diode.

Yes, possibly. John Byrns has written about the J.W. Miller TRF AM
tuner quite a few times, along with other related ones (and the early
30's Western Electric 10A which seems to have inspired the others.)

See, for example:

http://groups.google.com/groups?selm...&output=gplain

(Is there a schematic of this tuner online? John had it at his site at
one time, but apparently has taken it down.)

Hopefully John will have time to comment on his approach to designing
a workable, improved modernized version of this class of tuners,
suitable for diytube-like kit-building, with working PCB boards. I
know the TRF design is capable of very clean audio, and this is one of
the things which intrigues me about the TRF designs in general, since
the tube-o-philes want very clean sound from their components. Can a
super-het design accomplish the same sound quality? Probably, but I'm
still intrigued with the TRF....

Jon Noring

In article ,
says...
wrote:
Jon Noring wrote:

Well, being the "OP", I want a high-audio performance, modern
design AM tuner to integrate into my audio system -- and I believe
a lot of tube-o-philes likewise want that -- but not everyone
obviously. There are several reasons why most higher-grade audio
systems use separate components, the reasons of which are obvious
to most everyone. The AM tuner is no different than other audio
components in this regard.

Maybe what you want is the old JW Miller passive AM tuner. No
active devices at all, just a bunch of tuned circuits and a detector
diode.

Yes, possibly. John Byrns has written about the J.W. Miller TRF AM
tuner quite a few times
Back in the 70's I built a passive diode detector receiver for the
broadcast station I worked for. The transmitter was only a mile away.
It was flat out to 10 KHz, and we used it for a line-level signal that
was usually used for the control room monitor speakers. We could A-B the
line out going to the transmitter and the received signal. It was good
for understanding how the audio limiting at the transmitter was
affecting different kinds of program material.

--
Regards, Terry King ...In The Woods In Vermont

"The one who dies with the most parts LOSES! What do you need??"