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Rob, Question re your "Custom Front Panel Switch" mod
I don't see any mention as to what type of capacitors to use. The reason I ask is I don't know why Drake used large tubular capacitors in their design. Is there any reason ceramic capacitors can't be
By Bill Leonard N0CU · #70055 ·
Re: R4C 1500hz crystal filter damaged
Hi Rob, It is Network Sciences Date Code (?) 7905 Thanks Lionel
By Lionel B · #70054 ·
Re: 2-C Receiver
One caution! If the knob is loose, please do NOT overtighten the set screw. This will surely result in the knob being stripped or split. If it's loose because the shaft is hard to turn, remove the
By John K5MO · #70053 ·
Re: 2-C Receiver
A normal selector switch. Is your knob set screw loose? ....Dave
By Dave Edwards · #70052 ·
Re: 2-C Receiver
That knob should most certainly operate with a click at each position, allowing reception of AM, USB and LSB/CW. There are two possibilities. One is simple, that the set screw for the knob is loose. I
By Gary Follett · #70051 ·
2-C Receiver
Hello everyone, Last summer I picked up a 2-C to go with my 2-NT. I have been using it for CW without any troubles. I tried to listen to some SSB signals tonight and I found a problem... I cannot tune
By Dave Stepnowski KC3AM · #70050 ·
Re: LED bulb conversion
Doug, Yeah, its personal preference at this point.? Some guys figure its supposed to be Lagoon Blue so they use blue LEDs.? OOH, not for me. Warm white is what I think is best but...? I bought the
By Gary WB6OGD · #70049 ·
Re: R4C 1500hz crystal filter damaged
I was going to post the exact same thing. I second it... JB WELD should fix it. You probably need to make it a little thicker than the original insulator for strength. If it doesn't plug in quite as
By Gary WB6OGD · #70048 ·
Re: R4C 1500hz crystal filter damaged
Lionel,Possible solution FWIW: Pull the pin out of the case to the position you want it Do some careful horizontal surface scoring near the base of the pin (small file, nail file, etc.) - don't go too
By Steve W7SJT · #70047 ·
Re: R4C 1500hz crystal filter damaged
Which OEM made the filter? Rob, NC0B
By Rob Sherwood · #70046 ·
R4C 1500hz crystal filter damaged
One of the pins is pushed back into the filter case. I can gently pull it back into position but have found no way to secure the pin from outside of the case. I have tried various cements, epoxy,
By Lionel B · #70045 ·
Re: LED bulb conversion
Gary, I did the same thing but I found the bright white to look the best in my 4C line. However, I was not using the same style bulb. It is convenient to use the bayonet style though as it is just a
By Doug Crompton WA3DSP · #70044 ·
Re: DRAKE TECHNICAL NET UPDATE ( March 19, 2023 )
I'm in south central Montana and can only hear the net down in the noise on 40 - unintelligible. The Collins group has a weekly net on 20 meters that I can easily copy on the high end of 20.
By Steve W7SJT · #70043 ·
Re: DRAKE TECHNICAL NET UPDATE ( March 19, 2023 )
I would sure like to participate in a 40m "Drake Net" but I cannot hear anyone on the above net. There doesn't seem to be one (40M) reachable from the West Coast.? There is some sort of a Drake net
By Rick WA6III <myr748@...> · #70042 ·
LED bulb conversion
I was really disappointed in the looks of my old #47 bulbs in my 4A line so I changed the bulbs out for LEDs finally. Not only do they keep the front of the radio so much cooler, the looks are so much
By Gary WB6OGD · #70041 ·
Re: R4B 50 Khz I.F. sweep.
Hi Dave! I use an Elecraft K3 with a P3 daily, and when I refurbished my old(ish) B-twins a few years ago I wanted to see the effect of the variable passband filtering, so that meant looking at the 50
By Howard Hoyt · #70040 ·
Re: R4B 50 Khz I.F. sweep.
Boy that was a fast response thanks guys for the tips. The SA I have is a Rigol 815TG? which is the same unit WA8SAJ uses so figured I was good to go unfortunately I'm a little new to spectrum
By W6MQI · #70039 ·
Re: R4B 50 Khz I.F. sweep.
For my single conversion Hammarlund alignments I make extensive use of an SA - the Hammarlund folks at the factory were funny about that. Anyway, any of the new generation SA's like Siglent, Rigol,
By Dan · #70038 ·
Re: R4B 50 Khz I.F. sweep.
I have a 3585B. A beautiful instrument. I also have a 8594E with TG and narrowband options that is a bit more portable. It's spec-ed down to 9 KHz but I've never pushed it that low. My NanoVNA claims
By Jim Shorney · #70037 ·
Re: R4B 50 Khz I.F. sweep.
I use an HP 3585A which is good from audio through 40 MHz. Rob, NC0B
By Rob Sherwood · #70036 ·