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Noisy power supply -- Heathkit HP-13
Resurrecting a Heathkit HP-13 As seen in my previous post I've taken the dark plunge into the world of tube radios. I want to start restoring my Heathkit HW-101, but before I can do that I must be...
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HP-23 upgrade board kit from Old Heathkit Parts
Breath new life into a Heathkit HP-23 power supply My recent interest in restoring a 1970s Heathkit HW-101 tube radio, is leading me down quite a winding path. Before I can even test the HW-101 I...
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The Heathkit HW-101 lives again
Ah, the sweet smell of hot tubes and resistorsHeathkit HW-101 after it's first QSO under new ownership I completed my rebuild of my Heathkit HP-23B power supply this morning. There was a bit of...
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Totally Tubular - images
The inside of a Heathkit HW-101 is too interesting not to photograph List of tubes and their function used in the HW-101OA2 Regulator (150 V).6HS6 RF amplifier.6HS6 1st receiver mixer.6AU6 Isolation...
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The dark side
Oh my, what have I done Don't take away my QRP CW card. I picked up an old, high impedance Heathkit microphone having the appropriate 2-pin connector. One pin is the mic line and the other is for...
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Self-service audio station report
Get a remote signal report via WebSDR I've been making modifications / upgrades to my old Heathkit HW-101. I've had a good number of CW QSOs and a couple of phone contacts with it so far and received...
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Voltage regulation, tube style
High voltage indeed The Meter on my Heathkit HW 101 stopped displaying ALC (dropped down to the negative stop). So, I opened up the old rig to have a look. I found that the B+ voltage was reading 33...
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Feeling gassy
Ionization is a beautiful thing A reader asked me to video the pulsing of the OA2 voltage regulator tube in action. OA2 VR tube glowing beautifully in back corner I turned the room lights down to...
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Oscilloscope now on the bench
Tektronix 475 Oscilloscope and Android Signal Generator App When I was debugging problems with my Ten-Tec Century/21, and especially my problematic one-watter kit, I needed to see more than DC...
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Need a Vacuum Tube?
Superstore for Vacuum Tubes When I started restoring my Heathkit HW-101 I thought it might be difficult to find replacement tubes. I initially only looked on eBay for tubes but then I was directed in...
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Remote VFO - Knight V-44
Everyone needs a remote VFO from 1955 Late night eBay surfing, and poor judgement led me to bid on a Knight V-44... and unfortunately won it...Note to self: Never browse eBay just before you go to...
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Metering High Voltage on the cheap
🗲 Heathkit VTM model IM-11 🗲 I recently got a taste for restoring and using vintage vacuum tube radio equipment. Using equipment that requires 800+ volts for making QRP transmissions is...
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Heathkit Art
Heathkit HP-23A and IM-11 I had just buttoned up a HP-23A, after testing its transformer. A fellow ham gave it to me for parts. This old stuff looks cool, so I took a pic with the phone and thought...
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Regulated voltage for Regenerative receiver project
Mr. Regula-tor Building a regenerative tube receiver seems to have been a rite of passage for all hams of yesteryear. Although I built one from a kit (4-States QRP) as my first electronics project a...
View ArticleSpace in Morse Code
Silence is Beautiful The space between characters and words is just as important as properly forming the characters. If you're rushing your characters the elements of one character will not be easily...
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Hallicrafters HA-1 Electronic Keyer
High Voltage Electronic Keyer from 1960 I've been interested in getting my hands on a Hallicrafters HA-1 since the first time I saw one online. A 60 year old (as of this writing) all-tube keyer...
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AN/GRC-9 aka "Angry Nine"
AN/GRC-9 - Long lived military commsMy lovely (and radioactive) RT/77-GRC/9Video summaryI don't recall where I first read about the Angry Nine, but it captured my imagination. I read everything I...
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Modernizing the DY-88 Power Supply
Go with a Modern VibeThe DY-88 Power Supply is a marvelous design... for the 1940's. It could take 3 different DC input voltages (6v, 12v or 24v) and output the 2 different filament voltages (1.5v,...
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The Endurance of CW in Amateur Radio
CW Spans a CenturyI've enjoyed using my "new"GRC-9 radio for making CW and AM contacts over the past month. During that time I've also discovered https://worldradiohistory.com/Archive-Radio-News/...
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GAS is Rearing its Ugly Head
GAS - Gear Aquisition SyndromeI have some excellent radios. I have a KX3 that does everything including ironing my pants (well almost) and a Ten-Tec Eagle that has the smoothest CW anyone could ever...
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