[Yaesu] comments on ft-757gx

[IK2WQI]

Darrel, Hart,
that's not completely true.

FT757GX and GXII
RX specifications
-----------------
Freq. Range:      continuous (RX and TX) 500KHz to 29.99999MHz (10Hz
                   increments + clarifier)
Clarifier range:  Unlimited
Circuit type:     Triple conversion superetherodyne
Sensitivity:      (CW,SSB,AM figures for 10dB S+N/N)
                   *1.5~30MHz   **500KHz~1.5MHz
                   SSB,CW(W),FSK better than *0.25?V **2.0?V
                   CW(N) better than *0.16?V **1.25?V
                   AM better than *1.0?V  ** 8.0?V
                   FM better than 0.6?V for 12dB SINAD
IF:               1st IF 47.060MHz
                   2nd IF  8.215MHz
                   3rd IF 455KHz
                   FM IF  455KHz
Image rejection:  better than 70dB
IF rejection:     better than 70dB for all frequencies

Filters are provided for
*SSB*(chrystal type),CW(W),FSK 2.7KHz at -6dB, 4.5KHz at -60dB
CW(N) 600Hz at -6dB, 1.3KHz at 60dB
AM 6KHz at -6dB, 18KHz at 60dB
FM 15KHz at -6dB, 30KHz at 60dB
This values are reached with passband tuning and width set to center f.
and maximum width.
N.b. SSB filter can be used for AM(N) with a simple internal wiring
modification of cc signal switch.

Dynamic range  better than 100dB (CW(N) at 14MHz)

Main differences between FT757GX vs. FT757GXII vs. FT747GX are mainly to
understand as subsequent evolution in front panel switches quantity
reduction (functions also), different max RFoutput Power (10, 100,
200Wpep models), enhanced CAT system functions, minor design
characteristics in both the RX and TXsection (targetted mostly to reduce
production costs).

The FT757GX/II  has fair RTX performances, is manufactured on top of
very modern technologies (for the '80s) but will still stay far ahead
some actual little dimensions HF rigs.

If you need more information on the TX part, ask.

Regards

Andreas Troschka.

vy 73s de IK2WQI - JN45OL


Hart Engel wrote:
> Tell me about this rig. how old is this model and filters for ssb etc. =

> Is the front end noisy?
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