Re: The Drake 2B and its Frequency Spread Limitations
|
If nothing else, I'd be skittish about the leads sticking up with high voltage on them.
Barry - N4BUQ
From: "Steve Wedge, W1ES/4 via groups.io" <w1es@...>
To: "DRAKE-RADIO" <[email protected]>
Sent: Tuesday, May 20, 2025 7:09:08 PM
Subject: Re: [DRAKE-RADIO] The Drake 2B and its Frequency Spread Limitations
My first 1-A came with diodes replacing the 6X4,? At the time, it was an easy mod that was popular at a time when people wanted to replace tubes.? I removed the diodes and bought a NOS 6X4 off eBay for about $4 + shipping.
If not properly compensated, using solid state diodes in place? of a tube can raise the voltage on the plate supply.? In the case of the 1-A, Drake used lots of taps to provide various voltages instead of just perhaps using two different plate voltages like the R-4(any).? The highest voltages were near 200V before I put the tube back in.
Steve Wedge, W1ES
Time flies like an arrow.? Fruit flies like a banana.
Sent with secure email.
On Tuesday, May 20th, 2025 at 6:32 PM, Richard W2ONE via groups.io <cowboyhat@...> wrote:
Hey Gary,
?
Here are some more pictures of my cabinet.? Yes, a previous owner stuck a Heathkit 100 kc Calibrator in place of the Drake 100 kc Calibrator.? A previous owner also replaced the 6X4 tube with two diodes.? I believe I read somewhere that this is a hack on the 2B, but I do not remember if the hack was an improvement over the use of the 6X4 tube or as a substitute if the tube cannot be located.? I would appreciate any words of wisdom that anyone has on these two situations (my Heathkit calibrator and the diode replacement of the 6X4 tube).
?
Other pictures showing the crystals that have been installed and the bottom of the chasis.
?
Richard
W2ONE
?
?
?
?
|
