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*** Indeed. I use mine to tune my piano! https://www.tunelab-world.com/ - Jerry, KF6VB

That may well be true but I will add that my phone is much safer resting several feet away from the workbench. :) If I damage a Tascam I have plenty of spares and they were much cheaper than a new

Jim, An iPhone actually is a great and accurate test instrument. The project mentioned is measuring the sidetone frequency (unless I am mistaken?). Phones have a microphone and a display right there,

Carbon comp resistors are sensitive to moisture as well as heat. The resistance to moisture depends a lot on the quality of the housing. About the best of the CC resistors is either Allen-Bradly or

That depends. I prefer not to use my phone as a test instrument. It is a phone, not a Swiss army knife. Aside from that, it only does audio over Bluetooth unless I use a special adapter on the data

As I mentioned I worked for a manufacturer of carbon and metal film resistors many years ago. We made MIL spec carbon film resistors. They were NOT delicate or fragile. Bot types got tested for

Better to get a free app for your phone.? Frequency counter/spectrum analyzer/tone generator/microphone all in the palm of your hand. I have SonicTools on my iPhone. 73, Gary WB6OGD

You probably have a 444D. Everything you need to know is on the internet. https://manuals.plus/shure/shure-444d-megnetic-controled-fixed-microphone-manual "Dean N2TNN via groups.io"

Folks, Is there a way to get any more adjacent signal rejection from the standard notch dial on a Drake R4C? Bill N1WL ?? ????????? CallSend SMSAdd to SkypeYou'll need Skype CreditFree via

Matt, I just picked up a Shute 444. Could you show me how you have the plug wired. My cable has 5 wires but 3 screws on the right angle plug. Dean Sent: Sunday, February 9, 2025 7:22 AM To:

Yeah, that would work! Good thinking. I've used Audacity to build two-tone and single tone test files to drive the transmitter from a media player for testing. "atlasstuff via groups.io"

All, I recently picked up a TR-4C and power supply. I rebuilt the PS and was able to get the TR-4C cleaned up and working properly. I know this is a SSB rig but also has a CW option. I have good

I have an extensive collection of parts that I’ve owned, off and on, since the 1980s (it’s a long story). In this stockpile, I have lots of resistors, including some carbon comps that go back as

Hi Jay, I have the same station here (T-4XC, R-4C, Shute 444). I get similar audio reports as well. ?The old technology is a pure joy to operate! -- 73s VE3MXG Matt Gervais

I've added a scanned version to the files section. Single sheet and resolution is good enough to be able to decipher the switch contacts. Steve G8GSQ

Jim, Thanks for the clarification. What you described (better) is what I took away from reading the Drake manual. The process was so quirky, it raised a flag in my head. Poking screwdrivers through

In the T-4XC I worked on there's a separate 3.3ohm resistor for the current metering. Thanks for the info. on resistors; early in my working life ( mil comms) it was drilled into me that carbon film

I have loads of nib,? carbon comp resistors,? I bought new, eons ago.... and they have all drifted to the high side, ( some as much as 30% on the high side).... just sitting in their original

You can find about of the same make and size and move the insides to the old enclosure. I have done this with several different pots. Steve Wedge, W1ES Time flies like an arrow. Fruit flies like a

A bit late to this thread. Drake seem to use a lot of the CTS 450 series pots. I would guess the pot in the AC4 is a CTS 450 series. You could get one of these from Mouser and swap out the wafer.