[TenTec] Corsair II PBT Question
barry.n1eu at gmail.com
Fri Oct 26 20:38:56 EDT 2012
Be sure to perform the carrier oscillator alignment (BFO) for SB-N and
SB-R before you do the PBT adjustment.
On Fri, Oct 26, 2012 at 5:12 AM, K4MT <k4mt at yahoo.com> wrote:
> My Corsair II has a problem with the PBT adjustment. I can not get the SB-N and SB-R to sound the same. When I adjust coil L4 the closest I can get is with the slug all the way to the top which raises the frequency f the 15.3012 crystal. I measured the frequency range of the 15.3012 oscillator and it varies from 15.3012 with the PBT control full CW to 15.2969 full CCW, I found that SB-R audio quality is very tinny. I was wondering since the crystal reads 15.2969 with PBT CCW (no voltage on the varactor) means the crystal is too low in frequency. Tentec wants 30 shipped so before I order one I was wondering what the experts on this group think.
> I have aligned the carrier oscillators so that is not the problem. It is the same on all bands and all crystal filters ( I have 2.4, 1.8, 500 and 250). Do you think the 15.3012 crystal is out of specs or is it something with the 2.4 9 MHz filter?
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