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I use an HP 3585A which is good from audio through 40 MHz. Rob, NC0B

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

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

Guess I should mention I have the exact same spectrum analyzer as WA8SAJ used in his test.

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

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

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

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)

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

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,

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

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

I have read that years ago, noted it on my schematic. I do find it hard to believe a Drake factory screw up that makes it to not work! I do have my T-4X on the bench right now, I will try to check it

In this article on conversion to 6146's? - http://www.k5dkz.com/t4x6146.html He states the following. This seems like a radical change of value. Is this valid? Exactly what does AGC do? Is this

Yes, finding .156 connectors is easy, perhaps I should've asked ones that are compatible with the originals as far as pin dia is concerned along with the hooks that hook over the edge of the pcb so

Mark, No, tell ron to keep the listing for me. Mike, WB8VGE SunLight Energy Systems The Heathkit Shop http://www.theheathkitshop.com/ J e e p o|||||||o

BTW a 12GN7 while not a direct substitute has the same pinout and is about twice the plate dissipation and higher transconductance than the 12BY7. I could not find one to try but it would be an

I think I have answered my own question. These tubes are basically one and the same. I found quite a few in my stash, and this RCA is numbered with all three types. I ended up using a JAN GE 12BY7A

I'll let Ron know to remove Bob's ad for those boards. He might have forgotten to advise him that they were all sold. Mike, should I remove your boards from the parts & service doc on his site? 73's,

Looking for a Excellent top cabinet if anyone knows where I might find one. An excellent original R7A manual would be nice too. Marty KL7AM