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Why is it so hard to find a good 1978 Firebird I can just use as a daily driver? Aside from how many of them were totalled by adolescent or drunk (or drunk adolescent) drivers in the last 48 years, you'll need to basically rebuild one that isn't a genuine "barn find" with low mileage. 48 years...

Just over 30 years ago, a customer wanted a roger beep that nobody else had. Started with a "Roger K" board and hacked it to become the infamous "Bump-Bump". The CAD system we used back then under DOS was called Supercad, sold by a company called Mental Automation. They have been gone for a...

Found on Scribd. 73

Here's the followup to the Mark 4A receiver crystal substitute mod. The Browning Mark 3 receiver is an older dog than the Mark 4/4A. Does use a crystal for each tuneable band. The first version from 1970 had only one tuneable band and two fixed-crystal channels. The one and only band crystal...

Bought one of these recently from Ali Express. The test leads were already assembled. A real necessity checking high-voltage transformers for insulation problems. 73

Some days cleaning up at my shop feels more like archaeology. Here's a sign a former tech put up after a customer zorched the finals in his FT-101. The other one cracked, this one only cratered on one side. About 30 years ago. Get glass hot enough and it gets soft. A stab from the past. 73

Pretty sure the chatroom thread he started concerns a Dentron GLA1000 that won't key. Unless this amplifier has been modified, you need either a foot switch plugged into the socket marked "relay" on the back panel, or a radio that has a linear-keying relay inside it. The GLA is a ham linear, and...

So, this isn't the DX55 radio Big Mike was looking for. Doesn't have a counter display. It's a Superstar 3900 with 1984 date codes on chips inside it. Parts are missing. It has been converted to serve as a VFO for a Browning Mark 3 Sideband transmitter. Probably doesn't have enough drive level...

Drew this up ages ago from a customer's radio while it was here. The chip is a custom part meant to be used in a suburban-home intercom system, with a single Ding on the yellow wire for the front door, a double ding-dong on the brown wire for the back door, and a third noise that I can't...

Got a request from a customer. Wants a how-to for the diode swing mod applied to a RCI2995DX. The surface-mount main circuit board has the same basic circuits as the older 2950/70/90 radios, just laid out differently. The bill of materials is: 1) 1N4148 small signal diode. There are any...

https://packaged-media.redd.it/av5h4bup3usg1/pb/m2-res_720p.mp4?m=DASHPlaylist.mpd&var=sgpssan&v=1&e=1775556000&s=5c064594f80341298dbc7e1fd6e66ab8314b6208 A cheap chuckle. 73

The Browning Mark 4A receiver has one crystal for each band it covers. The factory installed one at 22.82 MHz for channels 1-27 and 23.14 for channels 28-59. There was a crystal available to cover 32 channels below channel 1, 22.5 MHz. They were available for years from Barkett Electronics...

Here is the other half of the lower-channel mod for the Browning Golden Eagle Mark 4A. The receiver this time. The receiver comes with two tuneable bands and one "fixed" crystal receive frequency. The crystal socket is part of the front-end circuit board. Adding a third tuneable band requires...

This guy persuaded me 47 or so years ago that I'm not cut out for the SHTF apocolypse. YMMV 73

Here's the breezy version of extra transmit channels for the Browning Mark 4A transmitter. Not the Mark 4. Different transmitter altogether. This setup requires two toggle switches and wire. One DPDT on-on switch and a SPST switch. Or any substitute. The focus of this trick is nine...

So here's another idea that hasn't quite graduated to half-baked. More like half defrosted. Back in the day, if the hired help had a slow day, he would put together parts kits for rehabbing the tube CB radios. The pieces they would need is predictable up to a point. But there is always a fixed...

A pretty good HD restoration 73

Don't know if this story has reached this forum yet, got a link to this story from an old pirate-radio pal. Yeah, Steven's old. My advice is to steer clear of Belarus. https://tech.slashdot.org/story/26/01/21/2018229/ham-radio-operators-in-belarus-arrested-face-the-death-penalty I'm sure...

The RCI29 "10-meter" base radio is built into the same cabinet used for the Galaxy (RIP) DX2547 40-channel CB. Has the new circuit board used in the X9 and other models. This customer complained that the Tone knob didn't do anything. It's not strictly a "tone" control. Technically it's only a...

A long-time customer talked me into fixing his UR5QW equalizer/echo/etc audio gadget. Looks cool enough. Said it went totally dead. No output of any kind. And no schematic to be found. Sure enough, there's a tiny part that looks like either a surface-mount fuse or a PTC protector in line...