| Author |
Message |
    
Yosimity
Junior Member
Username: Yosimity
Post Number: 37
Registered: 11-2002
| | Posted on Friday, February 20, 2004 - 5:06 pm: | 
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Just bought a 6900 Turbo from Copper and put it in my truck. Every morning the frequency counter is off from the night before. As the day moves on the counter tends to fluctuate. It does not seem to be in the same place each time I get in the truck. Is this normal or should I return it for adjustments? |
Tech8541
Moderator
Username: Tech8541
Post Number: 92
Registered: 12-2003
| | Posted on Sunday, February 22, 2004 - 10:42 pm: |
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it is normal...i have not seen one that did not do this. that radio is more stable than it looks frequency wise. the built in freq counter is not the best counter in the world. its timebase tends to drift with temperature changes which makes it look the radio is drifting more than it really is. this can also work the opposite way and make the radio look like it has not drifted as far as it really has. anyway, just keep in mind that the freq counter in these radios are not high dollar freq counters, so don't expect them to be the most accurate or stable counters. |
Parts_man
Junior Member
Username: Parts_man
Post Number: 42
Registered: 2-2004
| | Posted on Sunday, April 04, 2004 - 9:49 am: |
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My Dosy has a freq. counter known as a Bigfoot under it. Placing antenna switch on dummy and keying on AM the Dosy goes to 27.1153 on radio and 27.1150 on Bigfoot counter.
Is the counter on the 6900 only unlocked on receive or is it ulnocked on tx as well. Seems like a high dollar radio should have a high dollar counter to me. Just my 2 cents worth. |
Kc0gxz
Advanced Member
Username: Kc0gxz
Post Number: 704
Registered: 3-2003
| | Posted on Monday, April 05, 2004 - 5:09 pm: |
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Parts_man
Like Lon stated above, the counters that are put in radios are subject to frequency drift with temperature change. They are all bottom of the line frequency counters. And don't believe them as gospel when changing from A/M to USB or A/M to lower SSB.
They are however a little more stable when used as a base radio because they don't see the drastic temperature change. But, they are close enough to read the (general) operating transmit and receive frequency. Just don't expect them to be dead on the money.
If you want a counter that's really accurate, expect to spend (at the minimum) $350.00 or more for a on-the-money-dead-nuts 8 digit frequency counter. But, these too need a bit of a warm-up period because of their built-in power supply.
Jeff, kc0gxz. |
