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max pro 1 tuneup question

 
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max pro 1 tuneup question
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woodro
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Marko, I finally got my transmitter mounted in an enclosure and tried powering it up for the first time. Can you tell me what i can do to be able to use the lock monitor "on" feature as it wont stay locked. Test menu says compress L7..tried that almost completely still same. I have not connected any audio yet, just the transmitter into a 50 ohm dummy load. Tuned unit to the lowest pitch as it said on cd.

thanks, Woody
Sat Feb 05, 2005 3:04 am View user's profile Send private message
woodro
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anyone have any input on this max pro 1 question?
Sun Feb 06, 2005 3:39 pm View user's profile Send private message
pcs
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Post Reply with quote
You're probably overmodulating. Make sure you're not.

Also make sure your output stage is tuned correctly as
per instructions and your unit is in metal enclosure,
with stable DC voltage.

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Marko - PCS Electronics
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Sun Feb 06, 2005 5:24 pm View user's profile Send private message Visit poster's website
woodro
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Marko, i can't be overmodulating as i have not yet connected any audio source. The power supply is a good quality power-one type swiching power supply. Unit is in a metal enclosure but without the cover at this point. The internal power supply (power-one) is providing 12vdc of excellent filtered regulated dc at 12v. Tried another power supply (external) which is providing 13.8vdc regulated (cb type) and same results. Tuned as per instructions for lowest pitch tone also. also tried compressing L7 as display indicates with no effect. will not stay locked in lock mode "on"

please let me know what i need to do to rectify this. Maybe putting the cover on the enclosure?
tks, Woody
Sun Feb 06, 2005 6:28 pm View user's profile Send private message
woodro
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I should also mention that i have added a small metal box shield around the vco section as suggested in the manual figuring this would give added stability.

tks
Sun Feb 06, 2005 6:33 pm View user's profile Send private message
woodro
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i'm tuning\setting up currently using a 10w 50ohm dummy load

woody
Sun Feb 06, 2005 6:35 pm View user's profile Send private message
pcs
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Where is the 56 ohms resistor, mounted close to the VCO coil.

This resistor needs to be some 5-10mm above the board and
moved close to the coil.

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Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Mon Feb 07, 2005 3:51 pm View user's profile Send private message Visit poster's website
woodro
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thanks for the reply Marko. This transmitter was bought assembled. Are you saying that i may still need to try and mount it higher or just move it over closer to the coil.
thanks
Mon Feb 07, 2005 4:50 pm View user's profile Send private message
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