Garey Barrell <[EMAIL PROTECTED]> made an utterence to the drakelist gang ---------------------------------------------------------------------- George -
No, it doesn't affect AM either, since you are just generating a carrier and screen modulating it. So the filters aren't really in the circuit at all for AM.
The TR-3 and the early TR-4's (the ones with the "soupcan" filters) have the same problem.
Again, it's not like you're going to be transmitting both sidebands or splattering up and down the band, but they certainly wouldn't meet today's spurious emissions limits. Or even last years limits! :-)
73, Garey - K4OAH Atlanta
[EMAIL PROTECTED] wrote:
Garey,
Thanks for the T4x info. I own a T4x and never knew the differences. Does it also affect AM?
Thanks in advance, George KB2Z
At 04:04 PM 6/12/04 -0400, you wrote:
Garey Barrell <[EMAIL PROTECTED]> made an utterence to the drakelist gang
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George -
You might want to consider getting a T-4XB instead, especially if you plan to use it on SSB.
Functionally, the T-4X is identical to the B and C versions.
Only "con" about the T-4X is that it has 4 pole SB filters rather than the 8 pole versions used in the B and C versions. They do generate some junk on the opposite sideband and close to the carrier.
This should not necessarily be a "deal breaker", but it does mean slightly lower carrier suppression and more spurious "junk" around an SSB signal. It would not be very neighborly to drive a linear amplifier with it. The X is spec'd at ">40 dB above 750 Hz" while the B and C are spec'd at ">60 dB" for sideband suppression. This is of no concern for CW.
From the front panel, the only difference is that the B has fewer calibration marks on the main tuning dial, black overprinting on the "above the belt" lettering, (making it readable!,), and slightly different main tuning knob.
Personally I would hold out for a B version.
73, Garey - K4OAH Atlanta
[EMAIL PROTECTED] wrote:
[EMAIL PROTECTED] made an utterence to the drakelist gang ----------------------------------------------------------------------
Hi Im looking for a descent T4x to go with my R4A
Dosent need to be perfect Just descent. Tired of the Ebay game.
Thanks
George NE2I
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