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adjustment, other than if the final RF output transistor should need to be 
replaced (which would also be rare). The sidetone level pot may be adjusted to 
set the level your liking, and the low battery level pot can be set to a level 
consistent with the battery type you use. This level is usually set to about 9.5 volts 
on factory wired units. To access these adjustments, the plastic case bottom must 
be removed. To do this, remove the four black screws from the case front panel, 
and remove the board set along with the case top half by lifting on the left side of 
the panel and maneuvering the BNC connector through its exit hole. All five 
internal adjustments will now be accessible. The sidetone level adjustment 
control is labeled on the left side of the lower board next to the power jack.  The 
PA bias and battery detector adjustments are labeled on the rear of the lower 
board. To set the low battery point, adjust the input DC voltage to the battery 
voltage you wish to have the alarm flash, and adjust the low battery pot until the 
red LED alarm LED blinks. Be careful not to adjust the bias pot by mistake! See the 
on-line building procedures for instructions on setting the PA bias. The blue signal 
strength LED sensitivity pot is located between the bias and battery voltage 
warning adjustment pots and is attached to the upper board.  Normally the pot is 
set for a faint glow of the blue signal quality LED with the RF gain control fully 
counterclockwise. The audio bandpass filter adjustment is labeled on the lower 
board at the front of the unit. The pot is adjusted for maximum sidetone audio 
volume while in narrow CW mode. This will be very close to the center of the 
rotational range.

 

TR-35 Connector Wiring

 

Phones Jack: The Phones (speaker) jack will work with a standard 3.5mm mono 
plug. A conventionally wired stereo plug may also be used. Note that the speaker 
ground connection must be made to the ring terminal of a stereo plug. Standard 
stereo headphones with a 3.5mm plug will work just fine. Do not use a stereo plug 
where the tip and ring connections are tied together. This will cause a short to 
ground and burn up the audio power amplifier! 

Key Jack: The Key jack will work with either a mono or a stereo 3.5mm plug. The 
tip and ground shell connections are used. There is no connection to the Key jack 
ring terminal inside the TR-35 

Содержание TR-35

Страница 1: ...anatory There is a keyer speed control 5 45 WPM on the left then the TX Power 0 5W adjust pot an RF gain control and a volume control The power on off switch is at the upper left the Receiver Mode AUX...

Страница 2: ...and band changes To exit the lock condition another longer switch activation is required Receiver Modes The Receiver Mode switch will toggle between Narrow Band CW and Wide Band CW with quick upward...

Страница 3: ...vel is internally adjustable from 9 to 11 5 volts Phones Power and Key Jacks An external speaker or headphones can be connected to the Phones jack on the right side There is more than ample audio avai...

Страница 4: ...cover Normal CW operation will not activate the power fold back circuit but key down times of 10 seconds at maximum power might particularly at higher DC input voltages If you need more than 5 seconds...

Страница 5: ...RF power control to check the recorded message Message 1 is selected by tapping the DIT paddle and message 2 by tapping the DAH paddle The selected message will immediately start to play and will play...

Страница 6: ...t to adjust the bias pot by mistake See the on line building procedures for instructions on setting the PA bias The blue signal strength LED sensitivity pot is located between the bias and battery vol...

Страница 7: ...Note that you may connect both a straight key and paddles and use either at any time No need to reboot the transceiver to switch from one to the other You re always ready for an unexpected SKCC contac...

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