EICO 324 Signal Generator Amplitude Modulation micro AM-broadcast

Lab micro AM-Broadcasting experiment demonstration with EICO model-324 signal generator (more information here: http://www.mzentertainment.com/studio_workshop_test_equipment_eico_324.html ), HICKOK HTS-81 Vacuum Tube Sine Generator (more information here: http://www.mzentertainment.com/studio_workshop_test_equipment_hickok_hts_81.html ) , B&K Precision Model-1477 Oscilloscope (more information here: http://www.mzentertainment.com/studio_workshop_test_equipment_bk_1477.html )

Category:

Science & Technology

Tags:

• EICO 324
• Eico model-324
• HICKOK HTS-81
• RF signal generator
• signal generator
• vaccum tube sine generator
• sine generator
• oscilloscope
• am broadcast
• am broadcasting
• amplitude modulation
• am
• test equipment
• radio
• diy radio
• am radio
• servicing radio
• radio repair
• vacuum tube

[chefbob5]

I have two more questions Doc. did you make a special cabel from the RF Out on the 324 with a probe on the other end? 2. What did you use to split the Sine wave side of the Hickok? Once I have that answered I think I can make this work.

Thanks, Bob

[DrZEEworkshop]

@chefbob5

Pause the video at 1:08

I have diy-made probe for old RCA VTVMs that has the same 5/8 connector, that's what I am using at RF OUT (yellow handle) , I grabbed the tip of that probe with Oscilloscope probe's hook-clip (channel B).

I have Banana connector at SINE output, dual-banana connector to alligator-clips cable (goes to EICO AUDIO In/OUT) , and! from dual-banana another banana-to-alligator short cable clipped to oscilloscope's probe tip Channel A.

read next post....

[DrZEEworkshop]

@chefbob5

ok...Bob,

so that's what I had, but you don't need any special connectors, you can simply use couple of short wires to split signal and use binding posts for connection. You even don't really need coax cables for sine audio signal, just keep the units close to each other so the wires are as short as possible.

Get yourself a bunch of small alligator clips, radioshack has them, you always need those around :)

[DrZEEworkshop]

@chefbob5

huh huh , looks like we are talking to the same mic at about the same time LOL

[chefbob5]

@DrZEEworkshop Actually after 3 hours of research I found it. I had remembered that it looked like a old microphone cable from my youth. And in fact it was the connector from a vintage Heathkit Mic. I dug a little further and found they were called a Switchcraft Connector 5/8" 2051F (for female). I looked on ePay and they wanted $10 a piece so then I went to Allied Electronics and bought 6 @ $4.26 each. Now you know where to get them and what they are called. Thanks

[DrZEEworkshop]

@chefbob5

Bob, the transistor radio is the AM Receiver in "both parts" :)

In the first part the AUDIO that is being transmitted is the SINE-WAVE from Audio (Sine) Generator, modulated in and "transmitted" by EICO 324, the radio is receiving it, and you hear the TONE sound.

The second part is the same set-up, but the audio comes from CD-Player instead of Sine-generator.

[DrZEEworkshop]

@chefbob5

Bob, look for so-called 5/8 or 5/8" or 5/8 inch vintage connector, sometimes people simple call it as "vintage mic connector", sometimes as "5/8 screw on" connector.

Also you can try without anything being connected to output. Simply place your AM radio right next to 324 and you can pick up the signal. But of course if you want to connect the output to oscilloscope then you need to figure it out. Alternatively you can replace that 5/8 with more common BNC or even RCA type jack.

[chefbob5]

@DrZEEworkshop Mike, the RF-Out on the Signal Generator takes a special connector which I need to make up some cables other then the stock one it came with. What the hell are those connectors called? I can not remember for the life of me. Thanks Bob

[chefbob5]

@DrZEEworkshop I am looking for the first part of the video using the Transistor Radio not the cd player. Thanks

[DrZEEworkshop]

@chefbob5

are you talking about SG-4800 test-set?

I don't have any papers about it.

You may try contacting Steve at stevenjohnson d o t c o m , maybe he has.

/mike