• General Radio GR 916-A RF (GenRad) Impedance Bridge Circa 1950

    Checking out the General Radio RF impedance bridge.

    published: 14 Nov 2015
  • Ham Radio 2.0: Episode 66 - General License Training Class

    At long last - the General Class videos are finally here. This is a 3-part session that took some time to edit. I wasn't happy with the session I recorded in Spring of 2016, so I had to wait until September for the W5HRC club's next class. Then editing, traveling and all of the other videos pushed it back some - but it is finally here and good until 2019. So you have about 2.5 years to go get your upgrade. Let me know in the comments below once you pass your exam!

    published: 08 Nov 2016
  • General Elektriks - "Raid The Radio" [Official Video]

    Raid The Radio Taken from "Good City For Dreamers" (2009) iTunes: http://bit.ly/1dFdZP4 Directed by Arno Salters http://www.discograph.com/generalelektriks/

    published: 07 Sep 2009
  • General Radio (GenRad) GR 1603-A Audio Frequency Z Y Bridge

    Documenting the General Radio Z Y bridge (Impedance - Admittance) and making a measurement on a vacuum tube audio transformer to determine primary impedance with different loads on the secondary.

    published: 20 Dec 2015
  • General Radio GenRad 1650-A Impedance Bridge.MOV

    Exploring the General Radio 1650-A impedance bridge circa 1966.

    published: 06 Feb 2012
  • Elektor Retronics (june 2007) - 1650-A Impedance meter

    Basic use of the General Radio Corp. Type 1650-A Impedance meter from 1960, demonstrated by Jan Buiting, editor of Elektor Electronics magazine. High-accuracy inductance, resistance and capacitance measurements.

    published: 02 Apr 2008
  • General Radio 1395P Unboxing

    Being a tech channel of sorts, I am basically obliged to do at least one unboxing video. Here it is - a General Radio type 1395-P, a little pulse forming module, from over 50 years ago.

    published: 17 Jan 2016
  • Vacuum Tube Audio Transformer Impedance Determined With General Radio Impedance Bridge

    Using the General Radio impedance bridge to verify primary impedance of an audio transformer with varying loads on the secondary.

    published: 04 May 2014
  • ESR Meter Compared To General Radio (Genrad) 1650-A Impedance Bridge

    Just having fun with my new Blue ESR meter and comparing it to another method of measuring equivalent series resistance in electrolytic capacitors.

    published: 22 Jul 2013
  • GENERAL RADIO 1412-BC DECADE VARIABLE CAPACITOR DEMO

    From their Owner's/ Service Manual: "The Type 1412-BC Decade Capacitor is a high-quality, wide-range instrument ideally suited to decade capacitor applications ranging from experimental circuits on a laboratory bench to permanent installations in a relay rack. Designed for versatility, this Decade Capacitor features fine adjustment over a wide range of capacitance, high resolution, and provision for two- or three-terminal connections on either the front panel or the rear of the instrument. The decade box has polystyrene capacitors with excellent dc and ac characteristics. Its low inductance permits use up to the supersonic frequency range with relatively little change in effective capacitance. The capacitors are housed in a double shielded inner box... Ceramic-insulated switches, with sol...

    published: 08 Mar 2014
  • #3: General Radio 1803-A accuracy

    This is a short follow up to the previous video on the General Radio 1803-A VTVM. In this piece we demonstrate that it now functions within specifications. The link to the General Radio Experimenter article mentioned in the video is http://www.ietlabs.com/pdf/GR_Experimenters/1950/GenRad_Experimenter_April_1950.pdf.

    published: 14 Feb 2016
  • General Radio - Genrad - GR874 Connector.MOV

    General Radio GR874 Connector illustration of how the connector plugs together and is both the male and female connector. There is no mate to the GR874 except another GR874.

    published: 26 May 2010
  • GENERAL RADIO CUSTOM STEREO AMPLIFIER G V1

    published: 29 Mar 2013
  • General Radio Type 821-A Twin-T Impedance Measuring Circuit

    A beautiful 67 year old General Radio instrument that works. Measures the complex admittance of circuits and components.

    published: 03 Jun 2017
  • General Radio 1231-B Amplifier and Null Detector

    published: 10 Jan 2016
  • STROBOTAC BY GENERAL RADIO COMPANY

    published: 21 Jun 2014
  • Flea market treasure vintage General Radio Type 1551 C sound level meter

    published: 10 May 2015
  • General Radio (QuadTech) 1864 Megger - Setup

    CAUTION: SHOCK HAZARD!!! This unit does not put out enough current to kill you (unless you have a bad heart), but the shock WILL HURT (Minimum 10V will put out 50 milliwatts, Maximum 1090V will put out 5.45 Watts). NOTE 1: Every time you relocate the Megger to another work location or whenever you change the Voltage setting, verify that the needle returns to Infinity and re-do the Calibration Procedure (aka Set Infinities) as necessary. NOTE 2: If either Set Infinity or Set Infinity Highest Range cannot be attained, even after resetting the needle with the mechanical adjustment, reject the Megger. Internal calibration is required and your readings will not be accurate. ---------- 1863 and 1864 Megohmmeters Instruction Manual Operation - Section 3 3.1 MEASUREMENT SETUP. 3.1.1 Ground...

    published: 13 Aug 2012
  • General Radio StroboTac 1531-AB External Triggering Demonstration

    Warning: Video contains FLASHING LIGHTS and FLICKER. Please don't watch if you are sensitive to flicker, or have epilepsy or any other seizure disorder. If you feel nauseous or headachy, please look away. Thanks! Erratum: At one point in the video I refer to the series resistor as "170k" but as I stated at first, and on the schematic, it's actually 120k ohms, and two of them in parallel on the 2n2222 module give 60k ohms. I finally figured out how to trigger the General Radio 1532-AB StroboTac with the external trigger input. I do have the original GenRad Delay unit for it, but it doesn't seem to be working. However, the system I've come up with should work better, since I'll be able to set a precise delay digitally using the Arduino in software. Here I just show the triggering system it...

    published: 19 Apr 2013
  • General Radio Genrad 1650 impedance bridge - Oscillator Circuit repair and calibration

    This video shows the repair and calibration of the oscillator circuit which was found to be off frequency, unstable and started to distort at just over 1vP/P. This is not a comprehensive video like usual but covers the repair, as i was not expecting to find this level of damage

    published: 26 Aug 2016
  • General Levy - Incredible [ Live @ BBC Radio 1 Studio ]

    WHICKED WHICKED! JUNGLIST MASSIVE! SUBSCRIBE FOR MORE! General Levy - Incredible [ Live @ BBC Radio 1 Studio ] General Levy - Jungle Is Massive [ Live @ BBC Radio 1 Studio ] M-Beat Featuring General Levy ‎– Incredible Label: Renk Records Country: UK Released: 1994 Genre: Electronic Style: Jungle WHICKED WICKED JUNGLE IS MASSIVE SUBSCRIBE!

    published: 29 Jun 2015
  • #2: General Radio 1803-A VTVM

    This video is about the restoration of a General Radio model 1803-A AC VTVM. Additional information on the meter can be found at http://www.ietlabs.com/pdf/GR_Experimenters/1950/GenRad_Experimenter_April_1950.pdf.

    published: 13 Feb 2016
  • General Elektriks - 2. "Raid The Radio" [Good City For Dreamers]

    General Elektriks - Raid the Radio Taken From: "Good City for Dreamers", released on the 23rd of February 2009 iTunes: http://bit.ly/1dFdZP4 Facebook: http://www.facebook.com/generalelektriks Myspace: http://www.myspace.com/generalelektriks Label: http://www.discograph.com/generalelektriks/

    published: 30 Nov 2011
  • General Elektriks - Raid the Radio

    Off the album good city for dreamers **REQUESTS? LET ME KNOW**

    published: 19 Aug 2010
developed with YouTube
General Radio GR 916-A RF (GenRad)  Impedance Bridge Circa 1950

General Radio GR 916-A RF (GenRad) Impedance Bridge Circa 1950

  • Order:
  • Duration: 22:07
  • Updated: 14 Nov 2015
  • views: 1281
videos
Checking out the General Radio RF impedance bridge.
https://wn.com/General_Radio_Gr_916_A_Rf_(Genrad)_Impedance_Bridge_Circa_1950
Ham Radio 2.0: Episode 66 - General License Training Class

Ham Radio 2.0: Episode 66 - General License Training Class

  • Order:
  • Duration: 2:48:47
  • Updated: 08 Nov 2016
  • views: 25005
videos
At long last - the General Class videos are finally here. This is a 3-part session that took some time to edit. I wasn't happy with the session I recorded in Spring of 2016, so I had to wait until September for the W5HRC club's next class. Then editing, traveling and all of the other videos pushed it back some - but it is finally here and good until 2019. So you have about 2.5 years to go get your upgrade. Let me know in the comments below once you pass your exam!
https://wn.com/Ham_Radio_2.0_Episode_66_General_License_Training_Class
General Elektriks - "Raid The Radio" [Official Video]

General Elektriks - "Raid The Radio" [Official Video]

  • Order:
  • Duration: 3:26
  • Updated: 07 Sep 2009
  • views: 1563945
videos
Raid The Radio Taken from "Good City For Dreamers" (2009) iTunes: http://bit.ly/1dFdZP4 Directed by Arno Salters http://www.discograph.com/generalelektriks/
https://wn.com/General_Elektriks_Raid_The_Radio_Official_Video
General Radio (GenRad) GR 1603-A Audio Frequency Z Y Bridge

General Radio (GenRad) GR 1603-A Audio Frequency Z Y Bridge

  • Order:
  • Duration: 16:36
  • Updated: 20 Dec 2015
  • views: 1030
videos
Documenting the General Radio Z Y bridge (Impedance - Admittance) and making a measurement on a vacuum tube audio transformer to determine primary impedance with different loads on the secondary.
https://wn.com/General_Radio_(Genrad)_Gr_1603_A_Audio_Frequency_Z_Y_Bridge
General Radio GenRad 1650-A Impedance Bridge.MOV

General Radio GenRad 1650-A Impedance Bridge.MOV

  • Order:
  • Duration: 15:17
  • Updated: 06 Feb 2012
  • views: 3104
videos
Exploring the General Radio 1650-A impedance bridge circa 1966.
https://wn.com/General_Radio_Genrad_1650_A_Impedance_Bridge.Mov
Elektor Retronics (june 2007) - 1650-A Impedance meter

Elektor Retronics (june 2007) - 1650-A Impedance meter

  • Order:
  • Duration: 4:26
  • Updated: 02 Apr 2008
  • views: 7620
videos
Basic use of the General Radio Corp. Type 1650-A Impedance meter from 1960, demonstrated by Jan Buiting, editor of Elektor Electronics magazine. High-accuracy inductance, resistance and capacitance measurements.
https://wn.com/Elektor_Retronics_(June_2007)_1650_A_Impedance_Meter
General Radio 1395P Unboxing

General Radio 1395P Unboxing

  • Order:
  • Duration: 6:29
  • Updated: 17 Jan 2016
  • views: 126
videos
Being a tech channel of sorts, I am basically obliged to do at least one unboxing video. Here it is - a General Radio type 1395-P, a little pulse forming module, from over 50 years ago.
https://wn.com/General_Radio_1395P_Unboxing
Vacuum Tube Audio Transformer Impedance Determined With General Radio Impedance Bridge

Vacuum Tube Audio Transformer Impedance Determined With General Radio Impedance Bridge

  • Order:
  • Duration: 5:57
  • Updated: 04 May 2014
  • views: 2964
videos
Using the General Radio impedance bridge to verify primary impedance of an audio transformer with varying loads on the secondary.
https://wn.com/Vacuum_Tube_Audio_Transformer_Impedance_Determined_With_General_Radio_Impedance_Bridge
ESR Meter Compared To General Radio (Genrad) 1650-A Impedance Bridge

ESR Meter Compared To General Radio (Genrad) 1650-A Impedance Bridge

  • Order:
  • Duration: 10:14
  • Updated: 22 Jul 2013
  • views: 2923
videos
Just having fun with my new Blue ESR meter and comparing it to another method of measuring equivalent series resistance in electrolytic capacitors.
https://wn.com/Esr_Meter_Compared_To_General_Radio_(Genrad)_1650_A_Impedance_Bridge
GENERAL RADIO 1412-BC DECADE VARIABLE CAPACITOR DEMO

GENERAL RADIO 1412-BC DECADE VARIABLE CAPACITOR DEMO

  • Order:
  • Duration: 2:48
  • Updated: 08 Mar 2014
  • views: 858
videos
From their Owner's/ Service Manual: "The Type 1412-BC Decade Capacitor is a high-quality, wide-range instrument ideally suited to decade capacitor applications ranging from experimental circuits on a laboratory bench to permanent installations in a relay rack. Designed for versatility, this Decade Capacitor features fine adjustment over a wide range of capacitance, high resolution, and provision for two- or three-terminal connections on either the front panel or the rear of the instrument. The decade box has polystyrene capacitors with excellent dc and ac characteristics. Its low inductance permits use up to the supersonic frequency range with relatively little change in effective capacitance. The capacitors are housed in a double shielded inner box... Ceramic-insulated switches, with solid --silver-alloy contacts..." Approximately 18" x 4" x 6"  8+ lbs.
https://wn.com/General_Radio_1412_Bc_Decade_Variable_Capacitor_Demo
#3: General Radio 1803-A accuracy

#3: General Radio 1803-A accuracy

  • Order:
  • Duration: 3:50
  • Updated: 14 Feb 2016
  • views: 75
videos
This is a short follow up to the previous video on the General Radio 1803-A VTVM. In this piece we demonstrate that it now functions within specifications. The link to the General Radio Experimenter article mentioned in the video is http://www.ietlabs.com/pdf/GR_Experimenters/1950/GenRad_Experimenter_April_1950.pdf.
https://wn.com/3_General_Radio_1803_A_Accuracy
General Radio - Genrad - GR874 Connector.MOV

General Radio - Genrad - GR874 Connector.MOV

  • Order:
  • Duration: 2:16
  • Updated: 26 May 2010
  • views: 1067
videos
General Radio GR874 Connector illustration of how the connector plugs together and is both the male and female connector. There is no mate to the GR874 except another GR874.
https://wn.com/General_Radio_Genrad_Gr874_Connector.Mov
GENERAL RADIO CUSTOM STEREO AMPLIFIER G V1

GENERAL RADIO CUSTOM STEREO AMPLIFIER G V1

  • Order:
  • Duration: 1:14
  • Updated: 29 Mar 2013
  • views: 482
videos
https://wn.com/General_Radio_Custom_Stereo_Amplifier_G_V1
General Radio Type 821-A Twin-T Impedance Measuring Circuit

General Radio Type 821-A Twin-T Impedance Measuring Circuit

  • Order:
  • Duration: 20:39
  • Updated: 03 Jun 2017
  • views: 662
videos
A beautiful 67 year old General Radio instrument that works. Measures the complex admittance of circuits and components.
https://wn.com/General_Radio_Type_821_A_Twin_T_Impedance_Measuring_Circuit
General Radio 1231-B Amplifier and Null Detector

General Radio 1231-B Amplifier and Null Detector

  • Order:
  • Duration: 11:18
  • Updated: 10 Jan 2016
  • views: 929
videos
https://wn.com/General_Radio_1231_B_Amplifier_And_Null_Detector
STROBOTAC BY GENERAL RADIO COMPANY

STROBOTAC BY GENERAL RADIO COMPANY

  • Order:
  • Duration: 0:27
  • Updated: 21 Jun 2014
  • views: 126
videos
https://wn.com/Strobotac_By_General_Radio_Company
Flea market treasure vintage General Radio Type 1551 C sound level meter

Flea market treasure vintage General Radio Type 1551 C sound level meter

  • Order:
  • Duration: 8:57
  • Updated: 10 May 2015
  • views: 404
videos
https://wn.com/Flea_Market_Treasure_Vintage_General_Radio_Type_1551_C_Sound_Level_Meter
General Radio (QuadTech) 1864 Megger - Setup

General Radio (QuadTech) 1864 Megger - Setup

  • Order:
  • Duration: 6:14
  • Updated: 13 Aug 2012
  • views: 2440
videos
CAUTION: SHOCK HAZARD!!! This unit does not put out enough current to kill you (unless you have a bad heart), but the shock WILL HURT (Minimum 10V will put out 50 milliwatts, Maximum 1090V will put out 5.45 Watts). NOTE 1: Every time you relocate the Megger to another work location or whenever you change the Voltage setting, verify that the needle returns to Infinity and re-do the Calibration Procedure (aka Set Infinities) as necessary. NOTE 2: If either Set Infinity or Set Infinity Highest Range cannot be attained, even after resetting the needle with the mechanical adjustment, reject the Megger. Internal calibration is required and your readings will not be accurate. ---------- 1863 and 1864 Megohmmeters Instruction Manual Operation - Section 3 3.1 MEASUREMENT SETUP. 3.1.1 Ground-Link Connection. The grounding link connected to the uninsulated, grounded, binding post can be connected from this ground terminal to the GUARD or the + UNKNOWN terminal. The ground link should be connected to the GUARD terminal if the sample to be measured is a small, separate component, or if it is a component mounted in an enclosure that should be guarded. However, if one terminal of the unknown must be grounded, then the link should tie the + UNKNOWN terminal to the instrument case. 3.1.2 Test Voltage Selection. The TEST VOLTAGE switch(es) should be set to the desired measurement voltage. The 1863 Megohmmeter has five individual test voltages, 50, 100, 200, 250, and 500 V. The 1864 Megohmmeter has a selection of 10 to 109 V in 1-V steps or 100 to 1090 V in 10-V steps. On the 1864 the right-hand TEST VOLTAGE switch must be set to the V position for the first set of voltages and to the 0V position for the latter set of voltages. 3.1.3 Set INFINITY Adjustments. To adjust the SET INFINITY controls, proceed as follows: a. Turn the instrument on. b. Set the function switch to DISCHARGE. c. Set the multiplier dial to any range. d. Make certain that there isn't anything connected to the UNKNOWN terminals. e. Adjust the SET INFINITY control for an INFINITY reading on the meter. The adjustment on the 1863 is made with a screwdriver; on the 1864 with the knob provided. f. Set the multiplier switch to the highest range (Type 1863, 1T-100G; Type 1864, 10-1T). g. Set the function switch to MEASURE. h. Adjust the SET INFINITY HIGHEST RANGE on the 1863 (screwdriver adjustment) or 1864 (knob adjustment) for an INFINITY meter reading. If these adjustments cannot be set to give an on-scale reading, turn the instrument off and adjust the mechanical meter adjustment (the center screw on the meter) to give a meter reading of less than a line width beyond INFINITY. Repeat steps a through g. 3.1.4 Connection of Unknown. Small components should be connected directly to the UNKNOWN terminals. Insulated leads (GR 274-LSR Single-Plug Patch Cord) can be connected to a nearby unknown, however, if the unknown resistance is high, leakage between the leads will cause a measurement error and changing capacitance to the high lead will cause a transient meter deflection. For such high resistance measurements, a shielded system is preferable. 3.2 MEASUREMENT PROCEDURE. 3.2.1 General. Either of two measurement procedures is used, depending on whether or not the correct resistance-multiplier range is known. If the range is not known, the search procedure (paragraph 3.2.2) should be followed. If repetitive measurements are to be made on a given range (i.e., if similar components are to be sorted) the sort procedure (paragraph 3.2.3) should be used. 3.2.2 Search Procedure. When the approximate resistance of the sample to be measured is not nown, proceed as follows: a. Set the multiplier switch to the lowest range. b. Set the function switch to DISCHARGE. c. Connect the unkown between the UNKNOWN + AND - terminals. d. Set the function switch to MEASURE. e. Rotate the multiplier switch cw until the meter gives a reading of less than 5. f. The resistance of the unknown is the meter reading multiplied by the multiplier-switch indication. 3.2.3 Sort Procedure. When the approximate resistance fo the unknown is known, proceed as follows: a. Set the function switch to DISCHARGE. b. Set the multiplier switch to the desired range. c. Connect the unknown between the UNKNOWN + and - terminals. d. Set the function switch to MEASURE. e. The resistance of the unknown is the meter reading multiplied by the multiplier-switch indication. For go-no-go checks, it is often useful to make a limit line of the outside of the meter case with a strip of masking tape.
https://wn.com/General_Radio_(Quadtech)_1864_Megger_Setup
General Radio StroboTac 1531-AB External Triggering Demonstration

General Radio StroboTac 1531-AB External Triggering Demonstration

  • Order:
  • Duration: 14:27
  • Updated: 19 Apr 2013
  • views: 540
videos
Warning: Video contains FLASHING LIGHTS and FLICKER. Please don't watch if you are sensitive to flicker, or have epilepsy or any other seizure disorder. If you feel nauseous or headachy, please look away. Thanks! Erratum: At one point in the video I refer to the series resistor as "170k" but as I stated at first, and on the schematic, it's actually 120k ohms, and two of them in parallel on the 2n2222 module give 60k ohms. I finally figured out how to trigger the General Radio 1532-AB StroboTac with the external trigger input. I do have the original GenRad Delay unit for it, but it doesn't seem to be working. However, the system I've come up with should work better, since I'll be able to set a precise delay digitally using the Arduino in software. Here I just show the triggering system itself, the Arduino part will be figured out.... soon. This video describes the StroboTac's trigger requirements, then goes on to show the system I developed to use the PhotoTransistor to trigger the DP101 pulse generator, and then use that generator's output to trigger an interface module made from a 2n2222 transistor and a couple of resistors, which then triggers the StroboTac itself. I go on to demonstrate the action "live" with some falling droplets happening. The video camera does't really pick up the stroboscopic frames very well, so at the end of the video I've included a couple of still frames which show the droplet position at the extremes of the trigger delay setting. I've also included a scrawled sketch of the PT hookup using the DP101 and also the direct hookup. Thanks for watching!
https://wn.com/General_Radio_Strobotac_1531_Ab_External_Triggering_Demonstration
General Radio Genrad 1650 impedance bridge - Oscillator Circuit repair and calibration

General Radio Genrad 1650 impedance bridge - Oscillator Circuit repair and calibration

  • Order:
  • Duration: 12:23
  • Updated: 26 Aug 2016
  • views: 359
videos
This video shows the repair and calibration of the oscillator circuit which was found to be off frequency, unstable and started to distort at just over 1vP/P. This is not a comprehensive video like usual but covers the repair, as i was not expecting to find this level of damage
https://wn.com/General_Radio_Genrad_1650_Impedance_Bridge_Oscillator_Circuit_Repair_And_Calibration
General Levy - Incredible [ Live @ BBC Radio 1 Studio ]

General Levy - Incredible [ Live @ BBC Radio 1 Studio ]

  • Order:
  • Duration: 3:20
  • Updated: 29 Jun 2015
  • views: 1357580
videos
WHICKED WHICKED! JUNGLIST MASSIVE! SUBSCRIBE FOR MORE! General Levy - Incredible [ Live @ BBC Radio 1 Studio ] General Levy - Jungle Is Massive [ Live @ BBC Radio 1 Studio ] M-Beat Featuring General Levy ‎– Incredible Label: Renk Records Country: UK Released: 1994 Genre: Electronic Style: Jungle WHICKED WICKED JUNGLE IS MASSIVE SUBSCRIBE!
https://wn.com/General_Levy_Incredible_Live_BBC_Radio_1_Studio
#2: General Radio 1803-A VTVM

#2: General Radio 1803-A VTVM

  • Order:
  • Duration: 14:33
  • Updated: 13 Feb 2016
  • views: 184
videos
This video is about the restoration of a General Radio model 1803-A AC VTVM. Additional information on the meter can be found at http://www.ietlabs.com/pdf/GR_Experimenters/1950/GenRad_Experimenter_April_1950.pdf.
https://wn.com/2_General_Radio_1803_A_Vtvm
General Elektriks - 2. "Raid The Radio"  [Good City For Dreamers]

General Elektriks - 2. "Raid The Radio" [Good City For Dreamers]

  • Order:
  • Duration: 3:50
  • Updated: 30 Nov 2011
  • views: 136155
videos
General Elektriks - Raid the Radio Taken From: "Good City for Dreamers", released on the 23rd of February 2009 iTunes: http://bit.ly/1dFdZP4 Facebook: http://www.facebook.com/generalelektriks Myspace: http://www.myspace.com/generalelektriks Label: http://www.discograph.com/generalelektriks/
https://wn.com/General_Elektriks_2._Raid_The_Radio_Good_City_For_Dreamers
General Elektriks - Raid the Radio

General Elektriks - Raid the Radio

  • Order:
  • Duration: 5:42
  • Updated: 19 Aug 2010
  • views: 81218
videos
Off the album good city for dreamers **REQUESTS? LET ME KNOW**
https://wn.com/General_Elektriks_Raid_The_Radio
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