Ok guys... I'm new to this, so please be kind. I like to tinker but I'm not an electronics tech to say the least.

I just purchased a Heathkit IG-102 Freg Generator off Ebay. I'm playing around with it and decided to do what appeared to be a simple check....

Fired it up.... indicator light comes on... let it warm up and plugged the probe from my TEK 475 Oscope into the EXT MOD IN/AF OUT connector. Switched the EXT MOD knob to AF OUT and observed a wave form at about 450 Hz on the TEK. Adjusted output on the IG-102 to 5 volts... on the scope. The manual for the IG-102 says it outputs a 400 Hz signal... Seemed to somewhat indicate things "sort of work".

I then decided to check the RF side of the IG-102 output. I turned the EXT MOD knob to EXT MOD and moved the TEK probe to the RF output connector on the IG-102. Regardless of which band I chose on the IG-102, I don't seem to be getting any output on the RF connector. Is this normal? I thought I'd see SOMETHING on the scope or am I all wet.

I know just enough about this to be dangerous, but I didn't pay alot for the IG-102 eith

:Ok guys... I'm new to this, so please be kind. I like to tinker but I'm not an electronics tech to say the least.
:
:I just purchased a Heathkit IG-102 Freg Generator off Ebay. I'm playing around with it and decided to do what appeared to be a simple check....
:
:Fired it up.... indicator light comes on... let it warm up and plugged the probe from my TEK 475 Oscope into the EXT MOD IN/AF OUT connector. Switched the EXT MOD knob to AF OUT and observed a wave form at about 450 Hz on the TEK. Adjusted output on the IG-102 to 5 volts... on the scope. The manual for the IG-102 says it outputs a 400 Hz signal... Seemed to somewhat indicate things "sort of work".
:
:I then decided to check the RF side of the IG-102 output. I turned the EXT MOD knob to EXT MOD and moved the TEK probe to the RF output connector on the IG-102. Regardless of which band I chose on the IG-102, I don't seem to be getting any output on the RF connector. Is this normal? I thought I'd see SOMETHING on the scope or am I all wet.
:
:I know just enough about this to be dangerous, but I didn't pay alot for the IG-102 eith
:
Terry

Hi:
With the int/ext switch set to ext modulation.. you don't need any external input to observe the pure RF (un-modulated) sine-wave RF signal output.

You might try setting the freq to say 1 mhz for example, and then connect your scope to the RF output.

With the COARSE attenuator knob set to HI you should be able to observe about 250-300mv pp signal max.
when you crank the FINE attenuator knob to full clockwise.
The sine-wave signal should drop down to almost nothing with the fine attenuator knob fully CCW.

OK... I got it! At a 50mv setting on the scope and in the AM band, I can see the signal. Tricky to sync though.... With the In Mod set, you can even see an apparent 400 Hz signal superimposed onto the carrier. Interesting toy anyway....

Thanks guys....

:Hi:
:With the int/ext switch set to ext modulation.. you don't need any external input to observe the pure RF (un-modulated) sine-wave RF signal output.
:
:You might try setting the freq to say 1 mhz for example, and then connect your scope to the RF output.
:
:With the COARSE attenuator knob set to HI you should be able to observe about 250-300mv pp signal max.
:when you crank the FINE attenuator knob to full clockwise.
:The sine-wave signal should drop down to almost nothing with the fine attenuator knob fully CCW.
:
:

:OK... I got it! At a 50mv setting on the scope and in the AM band, I can see the signal. Tricky to sync though.... With the In Mod set, you can even see an apparent 400 Hz signal superimposed onto the carrier. Interesting toy anyway....
:
:Thanks guys....
:
With that 475 scope you should have no trouble triggering or syncing on the un-modulated RF signal.

:OK... I got it! At a 50mv setting on the scope and in the AM band, I can see the signal. Tricky to sync though.... With the In Mod set, you can even see an apparent 400 Hz signal superimposed onto the carrier. Interesting toy anyway....
:
:Thanks guys....
:
:
::Hi:
::With the int/ext switch set to ext modulation.. you don't need any external input to observe the pure RF (un-modulated) sine-wave RF signal output.
::
::You might try setting the freq to say 1 mhz for example, and then connect your scope to the RF output.
::
::With the COARSE attenuator knob set to HI you should be able to observe about 250-300mv pp signal max.
::when you crank the FINE attenuator knob to full clockwise.
::The sine-wave signal should drop down to almost nothing with the fine attenuator knob fully CCW.
::
::
:

::OK... I got it! At a 50mv setting on the scope and in the AM band, I can see the signal. Tricky to sync though.... With the In Mod set, you can even see an apparent 400 Hz signal superimposed onto the carrier. Interesting toy anyway....
::
::Thanks guys....
::One of you mentioned a operation manual. I too hav an IG-102 and would very much like to get an owners manual. It has been about 30 years since I used and of this gear and It would help a great deal if someone could scan the manual and send it to my e-mail address;
retromobilia@comcast.net
::
:::Hi:
:::With the int/ext switch set to ext modulation.. you don't need any external input to observe the pure RF (un-modulated) sine-wave RF signal output.
:::
:::You might try setting the freq to say 1 mhz for example, and then connect your scope to the RF output.
:::
:::With the COARSE attenuator knob set to HI you should be able to observe about 250-300mv pp signal max.
:::when you crank the FINE attenuator knob to full clockwise.
:::The sine-wave signal should drop down to almost nothing with the fine attenuator knob fully CCW.
:::
:::
::
:

Hi John,

Just emailed the manual for the Heathkit IG-102.

Enjoy,
Gary

::OK... I got it! At a 50mv setting on the scope and in the AM band, I can see the signal. Tricky to sync though.... With the In Mod set, you can even see an apparent 400 Hz signal superimposed onto the carrier. Interesting toy anyway....
:::
:::Thanks guys....
:::One of you mentioned a operation manual. I too hav an IG-102 and would very much like to get an owners manual. It has been about 30 years since I used and of this gear and It would help a great deal if someone could scan the manual and send it to my e-mail address;
:retromobilia@comcast.net
:::
::::Hi:
::::With the int/ext switch set to ext modulation.. you don't need any external input to observe the pure RF (un-modulated) sine-wave RF signal output.
::::
::::You might try setting the freq to say 1 mhz for example, and then connect your scope to the RF output.
::::
::::With the COARSE attenuator knob set to HI you should be able to observe about 250-300mv pp signal max.
::::when you crank the FINE attenuator knob to full clockwise.
::::The sine-wave signal should drop down to almost nothing with the fine attenuator knob fully CCW.
::::
::::
:::
::
: