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Additional Drake T4XB pictures; Front ( https://w5rkl.com/wp-content/uploads/2025/04/Front-768x576.jpg ) Rear ( https://w5rkl.com/wp-content/uploads/2025/04/T4XB-Rear-View.jpg ) Inside Top View (

That's an interesting case. You should be aware that an oscillation will most likely be anywhere else but where you are listening. The 40 Meter instability that surfaces in some rigs actually occurs

I noticed it around 9 pm, CST on virtually all of 80M, 40M. I think it was present on 20M as well. Barry - N4BUQ

What time and what frequencies? 73 Stan KM4HQE

That's exactly what I thought it sounded like! Barry - N4BUQ

At my house it’s the xyl’s wash machine! AE8EA

Just tested mine using same settings and don't see meter swinging right after completion of character send during short CW delay settings. I did have a 40M parasitic oscillation but sounds different

The situation: When I transmit on CW and let up the key, the meter goes to the power out during key-down, as normal. When I let up the key at the end of sending, the meter swings hard to the right

I wonder if this might be a new Over-the-Horizon radar system? Lint, VE3CMQ Sent: Friday, 25 April 2025 12:06 To: [email protected] Subject: Re: [DRAKE-RADIO] Noisy Lower Bands

On Friday, April 25, 2025 at 12:37:39 PM EDT, n4buq <n4buq@...> wrote: I hear it also mainly on 80 meters as that is where I mostly operate.? I have no idea what it is.The s-meter

While listening to my TR-4 late yesterday evening, I noticed that the lower bands had a prominent, continuous "swish-swish-swish" noise at about 2 or 3 Hz. I checked and I was also getting that on my

Mike, I'm interested in the T-4XB. Can you send some more pictures of it to me? Thanks! Barry - N4BUQ

I currently have a Drake R4A receiver and T4XB transmitter for sale on my for sale webpage. Click link below to view the R4A and T4XB. Drake Gear For Sale <https://w5rkl.com/for-sale/> 73 Mike

Yeah it's crazy that we can keep these radios going. I got a c line like new in original boxes at Dayton last year. A few new caps and little effort and they work great. Keep up the great work Steve,

I oftentimes think that we take our favourite radios from the past as having survived because we have lavished lots of attention on them and have dutifully replaced old capacitors, etc.. Then I buy a

I don't see a SPR-4 front panel on the Nationwide Radio site https://ke9pq.com/ I see some R4C, TR4, TR4-C and TR4-CW RIT front panels. If there is one for the SPR-4 available, maybe someone stateside

Well, that's embarrassing. I thought I had looked in that very category but apparently not or else, I missed it in plain sight!. I did think it was odd they they wouldn't have it. Thanks, Steve, for

Barry wrote: The Mouser crystal may work fine, but I am compelled to point out that AF4K Crystals does stock 9.0 MHz crystals. You can find 9.0 MHz in both HC-6 and HC-49 holders

I'd be most concerned with the filament voltages. I normally see 730V on the HV here, which is just over 700V under idle conditions. I don't seem to have a problem with cathode emission issues with

I'm noticing that the HV from my rebuilt AC-4 is running quite high - on the order of 730VDC. I know that my line voltage is around 126VAC and if I run the AC-4 from an autotransformer, I have to