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Thanks for? telling up the repair. People put too much into the wattmeter numbers.? I just think that if any of the broad range wattmeters are with in about 10% that is good enough.? If I am

One has to be very careful about buying electronic parts from Amazon. Lots of counterfeit stuff here. mike wb8vge

Gang… An update on the W4 wattmeter. The one with the low readings and the inability to set the meter calibration has been fixed! The problem? Capacitor C5 showed about 3kΩ of resistance! Replaced

Sounds like a plan… many thanks. Mike, WB8VGE www.theheathkitshop.com

Amazon will sell us all the 1N34A's we want and the prices are inexpensive, about 60 cents each with free delivery for Prime members. [email protected]> wrote:

Germanium Diodes are used for Rectification/Detection (RF—> DC) in RF/SWR meters (and Antenna Tuners with Internal meters) due to low voltage drop (0.3V). Common Germanium Diodes are: 1N34(A), 1N60,

Mike, I did find some of my 1N34A diodes that I used in my W4. I will place a couple in the mail to you to try. Don't have enough to fix 4 W4's but it might be a start. 73? Bob

1N34A, to keep things original, are sold in many, many places. ?Some places specialize in vintage gear and carry them, and lots of other places too. ? Just do a Google search, or try eBay, etc. but

Clint, PIN diodes are used as variable resistors in attenuators or in AGC circuits.? For this application, you need a rectifier. Germanium diodes have a lower forward volage drop than silicon. Hot

As soon as you sell it you will wish you hadn't. :) 73 -Jim NU0C "K8CCA" <echapm4@...> wrote: -- 73 -Jim NU0C

Clint… R1 is right on the numbers… The plot continues. mike wb8vge

I guess I didn't realize that they were that expensive. I got my TR7 with vfo and power supply traded My fl2100b Amp for it as I ever used it. I guess I got lucky. I hardly ever use the vfo, maybe I

I now have a Noble Radio NRV7 that is working like a champ with my TR7. I still have a want for an RV75 as it is a complement to my Drake 7 line station. Can wait now.? Thanks. 73? Bob

If R1 goes high in value, you will get less signal to your meter. It’s the only resistor that’s common to both the power ranges. Clint, VE3CMQ Sent: Saturday, 20 January 2024 09:21 To:

I found some at Jameco. They’re 1N270 diodes mike wb8vge

Just did a search and cannot locate any of the proper diodes. I do have an electronic supply house nearby and they have in stock 93 of the 1N295H diodes.? They are Electronic Expeditors in

I did an Amazon search for 1N34A, and came up with several hits. Unfortunately, they're apparently not real germanium diodes, but rather hot carrier diodes. - Jerry, KF6VB

Yes my problem seems to be just like yours. One of the diodes was open which caused the meter to not work. I found some of the diodes and replaced both of them. That fixed the problem. Let me look to

Since you have one that works fine, why not use that one to garner the correct voltages & waveforms at each point of the circuit? - Jerry, KF6VB

Ralph, I’m going by the schematic that I uploaded. the instructions call for setting the 200W scale first, then the 2000W scale. That’s what Iv’e been doing Yes, cleaned the meter’s terminals