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Day late....Dollar short...Merry Xmas and happy New Year!

Note: For an external antenna connection in this case, I usually use a female SMA to female BNC adapter. Far more products support the old BNC standard, hence it will allow you more options.

Enhanced version with spliced schematic.

What Blackview tablet do you have? The 12, 13, 15, 80 plus other Blackview USB-C boards are all sold on AliExpress and elsewhere. Most are connected with a ribbon cable inside and the boards are simply attached with screws. No soldering required. I see that some of the boards even provide...

I was curious about some of the early mics used in Bob Dylan’s new official trailer, specially this skinny microphone with the large windscreen as shown in the photo. It was mentioned that only period (1964-1965) mics were used in the making of this movie. Thanks to others asking this same...

I found the enhanced version that I neglected to post along with the schematic.

I buy 3.5mm male to male mono audio cables and cut the cable in half. Saves me a lot of tedious soldering.

Lafayette Telsat SSB-140

Kris XL 50

Cobra 86XLR

An enhanced version of the Cobra 32XLR with a separate spliced schematic. A few others will follow.

Thanks for having the original scan of the Robyn SB-520D, this is my enhanced service manual. I also included a spliced and separate redrawn schematic.

First, those look repairable, but if you want new, try the following link. They’re typical RF chokes for the DC power line. https://www.ebay.com/itm/172874371507?mkcid=1&mkrid=711-53200-19255-0&siteid=0&campid=5336136228&customid=&toolid=10001&mkevt=1

Besides replacing all the electrolytic capacitors, two revisions were done on this radio. A heat sink was added to the audio chip, and my usual Din to 4 pin mic jack conversion. Initially the audio IC (uPC1224H) was fried. Fortunately I found another one in my audio IC bin. I believe it was...

Further study with respect to turning the news over to the entertainment industry, plus the elimination of the Fairness Doctrine is needed IMO.

How a person voted was a private issue when I was growing up. As it should be IMO. Disguised as a class discussion, I remember a few teachers in my elementary school asking us kids who we were voting for. They fully knew that kids at an early age mimic their parents. Living primarily in a...

Note: A “partial restoration” may only last temporarily and inflict further damage, unless you first replace all the electrolytic caps. Microphone selection will mainly depend on your voice characteristics. With most base stations during that time period, lollipop D104 mics were generally a...

RIP Mitzi Gaynor Selections from Rodgers & Hammerstein's South Pacific (1958)

My enhanced service manual, including a separate redrawn schematic for the beloved SX-101 classic. Look at that face on page 1. She’s got the look….

The SX-401 utilizes the Motorola M6040A PLL, same chip as my favorite O2A PLL. I didn’t realize that until after I examined the schematic. If I run across a decent example in the future, I’ll possibly convert one to 10 meters or low channels. As such, I did a mild enhancement of the service...