I collect and restore antique vacuum tube electronics (i.e. "boatanchors") and vintage solid-state gear.
Tektronix 454A loose BNC
The mounting nut on the Channel 1 BNC connector of my Tektronix 454A was loose.
It’s painful to get access as the channel 1 and 2 input circuitry is shielded. The screws are not Phillips; they are instead Pozidriv. …
Krohn-Hite UHR-220 Power Supply
I’ve acquired a Krohn-Hite UHR-220 high voltage power supply. Thanks Ross!
I really like the styling on these old Krohn-Hites.
The Jones socket offers the same voltages as the binding posts on the front panel. …
Tektronix 2213 focus repair
I was checking out my Tek 2213 scope before selling it, and noticed that the focus was fuzzy.
A little Duck-duck-go-ing informed me that this is a fairly common problem in this series of Tek scopes.
…Probe accessories for the GR 1806-A VTVM
Over on the Antique Radio Forum, Philip Colston was asking about accessories for the RF probe of the General Radio 1806-A VTVM.
It turns out that the tips are identical to the accessory tips for the Tektronix P6000-series scope probes:
…Ballantine Model 300-E Sensitive Electronic Voltmeter Instruction Manual
I scanned the instruction manual for the Ballantine 300-E and added it to my Liberated Manuals archive. Click the image below to download the PDF.
Uniden BC-50XL Scanner service manual
My old Bearcat BC-50XL scanner is showing its age. The squelch has stopped working. It’s probably bad capacitors, so I guess it’s time to build that capacitor ESR tester I’ve been designing off and on for the past decade.
…
Krohn-Hite 430-AB Audio Oscillator
I recently came by a Krohn-Hite 430-AB audio oscillator. I rather enjoy Krohn-Hite’s old tube test equipment, as they make heavy use of vacuum tube op amps.
Does anyone have a scan of a manual for the 430-AB that they could share?
…Information and parts suppliers for the restoration and repair of vintage test equipment
Changes
- 2018-06-15: updated test lead listing
General
Manuals
- BAMA, the Boat Anchor Manual Archive
- Didier's site (KO4BB)
- Ebaman (registration required, but painless and no spam)
- Tubular Electronics
- Heathkit Schematic and Manual Archive
…
V-M Model 800 Changer Restoration
With help from some folks on the Antique Radio Forum, I identified this changer as a Voice of Music model 800.
V-M model 800 record changer
It's a 78 RPM changer with an Astatic crystal cartridge. It was installed in a Detrola radio/phono as a replacement for the original turntable or changer. …
Detrola 448 Radio/Phono (Updated)
I'm restoring a Detrola Radio/Phono, chassis number 448.
I'd already pulled the changer and the chassis. The cabinet doesn't look too bad. Some missing veneer and flaking finish, but it looks pretty clean. …
Full index of posts to Antique Electronics and Vintage Solid State
- Tektronix 454A loose BNC
- Krohn-Hite UHR-220 Power Supply
- Tektronix 2213 focus repair
- Probe accessories for the GR 1806-A VTVM
- Ballantine Model 300-E Sensitive Electronic Voltmeter Instruction Manual
- Uniden BC-50XL Scanner service manual
- Krohn-Hite 430-AB Audio Oscillator
- Information and parts suppliers for the restoration and repair of vintage test equipment
- V-M Model 800 Changer Restoration
- Detrola 448 Radio/Phono (Updated)
- Micronta 22-204C Range-Doubler VOM
- Lafayette S-9 Radio/Phonograph
- 22-204A Multimeter.pdf
- AN/URM-25F Signal Generator
- Firestone 4-A-159
- RCA WV-97A Senior VoltOhmyst VTVM
- HP 6920B Meter Calibrator
- Measurements Corp VTVMs
- Knight-Kit 83-Y-135 Signal Tracer
- Weller W-TCP-K military soldering kit
- Weller W-TCP soldering iron
- Leeds and Northrup KS-10376 Null Voltage Test Set
- Hakko 472-1 Desoldering Tool
- Mike Higgins' Hickok tube tester calibration monograph
- URM-105C ME-77C Battery Replacement
- Eico 315 RF Signal Generator Redux
- Boonton Radio Corp 202-G FM-AM Signal Generator
- Electronic Instrument Companies in Boonton, NJ
- Philco 37-665X console
- NEARC Spring 2017 Radio Show
- General Radio 483-C Output Meter
- MIT Flea Photos - May 2017
- Battery testing
- 2017-539bc-calibration.html
- Signal-powered signal squarer
- Keithley Model 1201 cathode follower probe
- Hunter Compton battery scans
- Signal injector pens
- Record Changer Work Stand
- Sal Brisindi Capacitor Challenge
- NEARC Spring Meet
- Al Lein homebrew test equipment
- Quig tools
- Micronta test leads?
- Philco 46-1209 restoration
- What to do with a Philco 46-1209 console?
- Motorola 63X2
- RCA Master VoltOhmyst WV-87B
- Simpson 383A Capacohmeter 1966 version
- VTVMs with active RF probes
- HP 650A Output Divider Cable
- RCA Master VoltOhmyst WV-87A
- Non-Linear Systems MS-215 Miniscope
- Simpson Model 383A Capacohmeter
- Zenith H845Y restoration
- HP 400C oscillation
- General Radio 1214-A Unit Oscillator
- Heathkit IP-5220 Variable Isolated AC Power Supply
- Lambda 26 high voltage power supply
- RCA WG-289 HV Probe
- Spring 2015 NEAR-fest report
- Clive Sinclair's Transistor Superhet Receivers
- RCA Strato-World 3-BX-671
- McMurdo Silver Model 904 Capacitance Resistance Bridge
- Ungar soldering iron components
- Triplett No. 639-OS meter case
- Meter collection
- Calibration plans
- Unidentified Motorola AC/DC AM/FM transistor radio Model TT11EH
- HP 200CD serial number 739
- Ancient Micronta R-4002 VOM
- Western Electric KS-10376 Null Voltage Test Set
- Triplett or Simpson?
- Ungar Standard Line soldering irons
- Triplett 630-M
- Capacitor Leakage Test Fixture
- Triplett 800 VOM
- Triplett 850 VTVM
- Eico 315 Signal Generator
- V-M 1232 record changer restoration
- Power Designs 2K-10 HV connector
- Voice of Music 307 Stereo Phonograph electronics restoration
- Zenith 5D811 restoration
- Good-All Type 623 capacitors
- Electrolytic can oddity
- MIT EE Stockroom Cleanout, Part 2
- HP 410B restoration
- Simpson model 59 panel meter, 150V AC
- General Radio 602-J Decade Resistance Box
- Vide-O-belisk
- Weller 8200 Repair
- Triplett 310 VOM repair
- Weston Analyzer Model 980
- MIT EE Stockroom Cleanout, Part 1
- HP Test Equipment
- Wayne-Kerr B801 VHF Admittance Bridge
- Housings for RF probes
- Krohn-Hite 3202 Variable Filter
- Cushman CE-21 Frequency Selective Levelmeter
- Workshop Photos
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