[Elecraft] OT: QST's review of the Yaesu FTDX5000MP

[Kok Chen]

On Nov 16, 2010, at 2:25 PM, Wes Stewart wrote:

> There is a serious misconception by some true believers that Elecraft "invented" down-conversion (or at least conversion) to an i-f in the 8 to 9 MHz range.
> 
> Nothing could be further from the truth, and I know that the folks at Elecraft would never claim as much.  I had a Henry Radio Tempo-1 (Yaesu FT-200) back when radios warmed up the shack.  It was a 9 MHz i-f transceiver.

Check out "Solid-state Receiver Design with the MOS Transistor" in April and May 1967 issues of QST (WB6AIG is now K6GT).  

Part II of the article starts with the description of the "9 Mc I.F. amplifier" and mentioned that the crystal filter is the same one as used in the SX-146 (part of the "Hallicrafter Twins").

73
Chen, W7AY