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It should be obvious that where you messed with the bulb is the cause of the current problem.? Look for the obvious first. If the fuse didn't blow quickly, the short you caused may have removed

I'd be surprised if the're not D'Arsonval meters. If you see a moving coil it's a D'Arsonval meter. 73 de Andrew/N5ASE [email protected]> wrote:

A (somewhat) OTT solution would be to relegate the voltage measurement to a RaspiPI Pico (RP2040 microcontroller) ($12 for 2): *AMAZON - 2Pcs Raspberry Pi Pico Development Board, Raspberry Pi RP2040*

30uV is reasonable.? I can measure it using a calibrated signal generator.? While S-9. Is arbitrary, the sensitivity? spec of the receiver is not.? It is a gain spec and should be close.? If you

Steve, Knowing that you asked for 16/3 power cord information, I’ll pass along what I found with a suggestion. ?Here is a photo of a late make that has an 18/3 SVT 300V power cord installed, from

As I recently quipped to someone else, you need to follow the electrons. You should see the voltage at the collector on Q25 (power supply board) drop when you apply a signal. If not, Q25 is not

Not familiar with the rig but is the original fuse a slow blow or a fast blow and if slow are you using a slow blow ? Ralph ku4pt

Speaking of meters, the TR-4 manual states that 30uV should yield S-9. I know there's a lot of "controversy" around this but I'm wondering if this is a realistic expectation. I ask because I have to

I'm not certain, but I think I used some plastic (neoprene?) washers from one of the big-box stores when I needed one for my 2-B. Barry - N4BUQ

We do have a Files section for this group. /g/DRAKE-RADIO/files/1-A%20Early%20Schematic%20%28complete%29.pdf /g/DRAKE-RADIO/files/1A%20Early.zip "Edward J. Smith via

Yeah I thought the same thing FILAMENT fuse. But I wasn't sure on how to approach finding the culprit. But yeah, pull all the tubes and bulbs out and ohm out them all out! Or it could be the stupid

Ken I looked for a dim bulb tester on youtube and I don't see how that would help me? It looks like you put the AC line cord into one end and a light bulb tells you if you have a short or not. I

The filament fuse runs the ...?? FILAMENTS. I would unplug all the tubes and bulbs and check the wiring with an ohmmeter. If it looks good (no shorts to ground), put them back in checking after each

I've never had a bouncy Drake meter, thank goodness. But I have seen bounce in my Fuel gauge in my old 1964 british Sunbeam car. I went inside the gauge and just pushed the needle back and forth and

Hey Everyone, I’m restoring a 2-B and would like to get an update on panel spacer availability. ?Some time ago, ?2bradioparts.com stocked spacers that he had labeled as being for 4-Line radios; I

Has anyone ask Bill Frost if he knows who made the meters? Maybe one can determine the type of meter if we know who made it. 73 Stan KM4HQE

Hey Ken I will do a search on that. Tnx! Mark

I suggest using a DBT (Dim Bulb Tester) while checking the rig. It will save fuses, transformers, diodes, etc. If you aren't familiar with it just use your favorite search engine and learn about it,

Are these in fact moving coil meters.? Don't look like it.??Moving coil (d'Arsenval) meters act like motors, if you short the terminals a back- emf is generated which demos the Meyer.? The Drake

Out of curiosity I left the rig on for a little longer (for like 5 seconds) and that filament fuse blew again! I don't know how to figure out how it keeps blowing? Mark