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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 ·
Re: R4B 50 Khz I.F. sweep.
When I sweep something like this I feed in the tracking generator signal, preferably a stage before, through with around a 10k resistor. The I preferably use an FET probe to pick off the signal that
By Rob Sherwood · #70035 ·
Re: R4B 50 Khz I.F. sweep.
50 KHz is hard. Most analyzers that could fall into ham hands don't go down that far. I have an old HP that goes down to 20 Hz but it would anchor a decent size boat. 73 -Jim NU0C "W6MQI via
By Jim Shorney · #70034 ·
Re: R4B 50 Khz I.F. sweep.
Guess I should mention I have the exact same spectrum analyzer as WA8SAJ used in his test.
By W6MQI · #70033 ·
R4B 50 Khz I.F. sweep.
Has anyone ever tried to sweep the 50Khz I.F. in the R4B with a spectrum analyzer?? WA8SAJ had a powerpoint presentation a few years ago showing screenshots using his SA to sweep the 50 Khz I.F., but
By W6MQI · #70032 ·
Re: Twins RCA cables
I think this is an example of the "real hams" make their own cables claim many like to make, he's just making an allowance for the elderly and handicapped... Ken, N2VIP
By Ken N2VIP · #70031 ·
Re: Twins RCA cables
At what age does elderly start? Are you sure they wont sell them to the young or non handicapped? Just askin... Jim W7RY -- Thanks and 73, Jim W7RY
By Jim W7RY <jimw7ry@...> · #70030 ·
Re: Twins RCA cables
Elderly or handicapped radio amateur can buy pre-made cables for Drake?4-line Twins or Collins S-line from Joel at RF Connection ( Gaithersburg, MD)
By Greg W9GB · #70029 ·
DRAKE TECHNICAL NET UPDATE ( March 19, 2023 )
Today we had 31 stations checking into the net on 7.238. It was a bit rough with the Virginia QSO part going on, but we made it through with little difficulty. The following radio's were used to check
By M Gilger · #70028 ·
Re: Success- the vernier drive on my T-4XC is back together and working.
I tend to leave the drive alone unless there¡¯s a problem with moving the slug rack. The problem usually manifests itself at the high frequency end (10m). If resetting the preload won¡¯t fix it,
By Steve Wedge, W1ES/4 · #70027 ·
Success- the vernier drive on my T-4XC is back together and working.
After trying unsuccessfully for several days to reassemble the vernier drive on my T-4XC, I noticed a small ball bearing on the carpet under my work bench. Since the vernier drive is the only thing I
By Bill Leonard N0CU · #70026 ·
Re: T4XC AGC
For what it's worth, Drake does call it AGC on the schematic.? His statement as I read it is saying that as shipped with the 1 Meg AGC does not work properly and adding the 15K makes it work, At
By Doug Crompton WA3DSP · #70025 ·