| Author |
Message |
    
Cdc181
New member
Username: Cdc181
Post Number: 9
Registered: 2-2004
| | Posted on Thursday, March 24, 2005 - 3:26 pm: | 
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when tuneing the transmitt on a 93t should a tone be used or will a aaaaaaaaaaa work as well like on some of the older radios |
Cdc181
Junior Member
Username: Cdc181
Post Number: 12
Registered: 2-2004
| | Posted on Saturday, April 02, 2005 - 7:35 pm: |
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is there a way to strap the 2sc2290 like a npc-rc mod |
Patzerozero
Advanced Member
Username: Patzerozero
Post Number: 651
Registered: 7-2004
| | Posted on Saturday, April 02, 2005 - 10:45 pm: |
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if you're looking for absolute perfection on a scope, a steady tone generated at the correct freq is what you're looking for. if you're just quickly peaking it on a watt meter, try the 'aaaaaah', also, try a differently pitched tone, saying 'aaayyyyyyyye' and even 'eeeeeeeeeeee' & see what different peaks you get. a count of 1 to 10 after peaking 1st on each of the different pitches will give you an idea of whether or not you peaked to the normal range of YOUR voice. not perfect, but if that's all you got, it'll do.
if the 2290 is actually the final stage of the 'normal' radio, then yes, it could be volted & npc-rc modded. if it's designed as a separate amplifier, then the 'true' final of the radio would be modded to get max performance from the 2290, say 1-30 watt carrier & 80+ swing.
have never thought to attempt it with such a radio, so would have to look at schematic & radio to see if it's feasible, or even possible. |
Cdc181
Junior Member
Username: Cdc181
Post Number: 17
Registered: 2-2004
| | Posted on Monday, May 02, 2005 - 7:45 am: |
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well thats what i was thinking because it has a final 2sc2312 and then the amp so if the final could be volted that would driver the amp more.Not sure if you see the inside of one but have to do some looking around and see whats what |
Cdc181
Junior Member
Username: Cdc181
Post Number: 24
Registered: 2-2004
| | Posted on Tuesday, January 01, 2008 - 7:33 pm: |
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ok i know it's been 2-years now i got 40-50w swing with a 4w deadkey now can you get 80+ swing out of the 93t and what do they do to get it |
Mrsandman
Intermediate Member
Username: Mrsandman
Post Number: 112
Registered: 1-2002
| | Posted on Wednesday, January 02, 2008 - 6:29 am: |
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SETTINGS CONNECTION
ADJUST
ADJUST FOR
Remove TP7-TP9 Jumper PCB.
TX CARRIER OSCILLATORS:
AM TX Mode
Band E CH. 1 Connect Frequency Counter to TP6
L25
LSB/TX mode: Adjust for 10.6975MHz ±20Hz.
Connect Frequency Counter to TP6
L24
USB/TX mode: Adjust for 10.6925MHz ±20 Hz.
Connect Frequency Counter to TP5
L23
AM/TX mode: Adjust for 10.6950MHz ±20 Hz.
DRIVER BIAS: (2SC2166)
Set Radio to:
Band E, Ch.1
Mode to USB
MIKE GAIN at minimum. Connect DC Ammeter between TP7 and TP9.
VR12
Key TX adjust for 75-100mA.
FINAL BIAS: (2SC2312)
Set Radio to:
Band E, Ch.1
Mode to USB
MIKE GAIN at minimum Connect DC Ammeter between TP7 and TP8.
VR11
Key TX & adjust VR11 for 25-30mA.
AMP BIAS: (2SC2290)
Set Radio to:
Band E, Ch.1
Mode to USB
MIKE GAIN at minimum Connect the red lead of the DC Ammeter to the (+) terminal on chassis mounted terminal connector next to DC power jack. Unplug the red wire connector from the AMP pcb and connect the black lead of the DC Ammeter to that post
None
Check for 50-60mA.
Replace TP7-TP9 Jumper PCB.
RF AMP CHAIN:
Replace shorting pcb.
Set mode to AM.
Set RF power switch to HI . Connect wattmeter to ANT output.
L44, L43,
L42, L40,
L44
Key TX & adjust (in order) for maximum RF output . Recheck power across entire freq range.
Readjust L44 for minimum SSB distortion.
SSB CARRIER BALANCE:
Set mode to USB
Set RF power switch to HI
MIKE GAIN to minimum. Connect wattmeter to ANT output.
VR6
Key TX, adjust for min. carrier leakthrough on scope or wattmeter. Recheck on LSB mode. If necessary readjust for best balance of sideband suppression between LSB & USB
SSB APC:
Set mode to USB
Set RF power switch to HI
MIKE GAIN to minimum. Connect DC voltmeter from pcb ground to TP7
VR17
In TX,
adjust for 13.0vdc
SSB ALC:
Mode to USB.
MIKE GAIN to maximum.
Inject two-tone audio signal of 700Hz and 1900Hz, 30 mV to Mic input. Connect wattmeter to ANT output.
VR13
L44
In TX, adjust for
50 watts PEP.
Adjust for minimum distortion on scope
AM CARRIER POWER:
Set mode to AM,
MIKE GAIN at minimum.
RF Power SW to HI. Connect wattmeter to ANT output.
CAUTION! Do not exceed power levels. Damage to power transistors and inability to achieve 100% modulation from insufficient audio power will result.
VR14
Set RF PWR to HI
adjust for 20-25 watts
VR911
Set RF PWR to MED
Adjust for 10-15 watts
VR18
Set RF PWR to LO
Adjust for 2-5 watts
RF METER:
Set mode to AM,
RF Power SW to HI
MIKE GAIN at minimum.
Meter Switch to PWR Connect wattmeter to ANT output.
VR9
Adjust so meter agrees with Wattmeter.
AMC:
Mode to AM.
RF Power SW to HI
MIKE GAIN to maximum.
Inject audio signal of 1KHz at 30mV to Mic input. Connect modulation meter to ANT output.
VR16
Adjust for 100% modulation depth.
MODULATION METER:
Mode to AM.
RF Power SW to HI
MIKE GAIN to maximum.
Meter Switch to MOD
Inject audio signal of 1KHz at 30mV to Mic input. Connect modulation meter to ANT output.
VR15
Adjust so meter agrees with modulation meter.
FM DEVIATION:
Mode to FM
MIKE GAIN to maximum.
Inject 1 KHz, 30 mV audio signal at mike jack. Connect deviation meter to ANT output.
VR5
Adjust for total deviation of 4.5 KHz. |
Cdc181
Junior Member
Username: Cdc181
Post Number: 25
Registered: 2-2004
| | Posted on Wednesday, January 02, 2008 - 8:17 am: |
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did all of this only getting 50w |
Patzerozero
Senior Member
Username: Patzerozero
Post Number: 4094
Registered: 7-2004
| | Posted on Wednesday, January 02, 2008 - 1:43 pm: |
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didn't see this one either  , but that's pretty much the link i sent, Cdc181. possibly either the driver or final, 2166 or 2312 is bad. |
Cdc181
Junior Member
Username: Cdc181
Post Number: 26
Registered: 2-2004
| | Posted on Wednesday, January 02, 2008 - 4:20 pm: |
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I'll go back and double check the bias on both but i see the driver says 75ma-100 so what would be good around 80ma |
Cdc181
Junior Member
Username: Cdc181
Post Number: 28
Registered: 2-2004
| | Posted on Wednesday, January 02, 2008 - 5:00 pm: |
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ok now went to check bias like say now i'm getting noting so how the radio still working if there is now bias reading. |
Cdc181
Junior Member
Username: Cdc181
Post Number: 36
Registered: 2-2004
| | Posted on Friday, February 15, 2008 - 8:38 pm: |
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hey tech 808 did any of you try the rf output mod on the 93t if so how did it come out |
Tech808
Moderator
Username: Tech808
Post Number: 15298
Registered: 8-2002
| | Posted on Friday, February 15, 2008 - 8:53 pm: |
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Sorry but no.
I have never owned, used or worked on one before.
Maybe another Copper Forum member who has experience with the 93T will be able to jump in and offer some help/advice.
Lon~Tech808
CEF#0808/HAM#001/CVC#0002
Tech808@copperelectronics.com
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Cdc181
Junior Member
Username: Cdc181
Post Number: 37
Registered: 2-2004
| | Posted on Saturday, February 16, 2008 - 12:50 pm: |
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ok will have to see if anyone else had tried this i heard it was a good mod same mod as dx949 and it's the same board down to a T just different numbers everything matches up same parts to |
