Ron -
You may need to recheck your frequencies. ~17 MHz is the "target"
frequency for the Lo Band VCO (through 20M), and 34 MHz for 15 and 10.
This is where the VCO's settle when unlocked.
First thing to check is the +24V DC supply. This higher voltage is used
for the Loop Filter and VCO steering. If the voltage is low, check that
"E" core on the DC/DC converter transformer on the little power supply
board.
There are other possibilities, but this is a start. Unless the
transmitter has been modified, it won't transmit if the VCO is unlocked.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line& TR-4/C Service Supplement CDs
<www.k4oah.com>
Ron wrote:
Got a strange one going on. Finished and 80 meter net and was headed to 40 to
listen to the Drake tech net. On 80 meters it work find. But when I go to
other bands, the display shows incorrect frequencies. Also on using the
up/down buttons it will go into strange frequencies as well.
1.5 show 1759x.4 and counts up slowly
2.5 same as above
3.5 80 meters okay and transmits
5 shows 1414.x
7 shows 3415.x14 displays okay
21 shows 17415.x
28 ok
I did not go further and attempt to TX for fear of further injury.
It would appear the VCO/PLL are messed up, but why such strange combinations?
First thing will be board removal and reseating unless someone has a specific I
should be looking for.
TNX es 73,
Ron WD8SBB
_______________________________________________
Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/listinfo/drakelist
