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One would assume that, since the DR7 gets the right answers on the low bands, that the DR7 is reading wha it sees on the high bands as well... Gary W0DVN

Of course that assumes that the counter is reading the signal correctly. Best to eliminate everything else before tearing in to the VCO board. If extender boards are not available U502 checks can be

If you happened to prefer a CW note that is, say, 400 Hz, it might be nice to center the PBT to optimize for a 400 Hz note. The same would be true if you preferred a 700 Hz tone. In an old-fashioned

What, if any, is the advantage of doing so? Just curious. 73, Steve W1SRD

Make the following check: Then: The math tells you that the VCO is operating at 100 MHz! No “N code” faults could produce that high frequency. There can't be anything wrong with the circuit before

Mine didn't have that so I made my own. Now I wished I had just ran another piece of coax.Sent from my T-Mobile 5G Device

Here it is. A screw with a plan head no slot or anything. Just some knurl around the outside and a nut.Sent from my T-Mobile 5G Device

The shorting trace would be obvious if you have the later circuit board. A single wide trace running from front to back with a hole for a wire at each end. The idea was to unsolder the coax center

I think I understand. The filter board itself had a way to bypass it. I kinda made my own shorting trace.?Sent from my T-Mobile 5G Device

N code info here: /g/DRAKE-RADIO/files/TR-7/TR7%20PLL%20N%20Code%20and%20Digital%20Control%20Board%20Information The Jumper Board logic chart is an early work by K4OAH (SK). It was

Yep I can see that. I used a small precision screw driver and a tiny ball peen hammer to coax the nut loose then kept flicking the nut till it fell apart.Sent from my T-Mobile 5G Device

Do you remember where the shorting trace is? I have not heard of that before. I did get that little bolt/ nut out of the band switch and bypassed the filter board. There is no way to get conventional

from what I’ve read, the LCD uses LEDs to provide the lighting. And, there are quite a few of them, like 64 leds…. the SW8 used a single bright LED with light pipes to the LCD. I don’t believe,

There is a company called “LCD Parts”, who sell replacement LED illuminators in strips that can be cut to length. Included with them is the required power supply. The cut-to-length” feature is

The VCO is running or you would not see a reading on the counter at all. Check to see if it locks in the band segments 15.0 through 16.5 MHz. If so you may have an N code problem. The A6 bit is unique

I've been following this thread, as I have a similar problem in my circa 1998 Yamaha stereo receiver. It has yellow LCD digits and they're now barely visible. Steve Wedge, W1ES Time flies like an

I think you can replace the illuminator in this display. It’s been a while but I recall having done it once. Gary W0DVN

There was a reason the power supply fuse popped. Check voltages there first. Gary W0DVN

The same on all bands. The max peak in TUNE mode is closer to 80mA, not 100mA. protonmail.com_at_groups.io_lastradioman@...> wrote:

Are the other bands working?