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Leader LSG-216 AM/FM Generator.

 
PYE625
(@pye625)
Famed V-Ratter Registered

Hello all,

Yet again I was trawling the bay for no particular reason (a dangerous thing to do) and happened upon this AM/FM signal generator. I recognised it immediately as I used one for many years at my previous employment. It was the reference for many a tuner that was produced and returned for service !

Anyway, this one will be winging it's way to me shortly and will be a very useful item. I obtained it for £90 so think it was pretty reasonable. Here are the vendors photo's of the actual generator for now.....

s-l1600.jpgs-l1600-1.jpg

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Topic starter Posted : 13/07/2017 10:40 am
freya
(@freya)
Noble V-Ratter Registered

Very nice bit of kit, and a great price !

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Posted : 13/07/2017 11:02 am
Nuvistor
(@nuvistor)
Famed V-Ratter Registered

It appears to have a Stereo Encoder built in, is that correct? Is it wideband FM or will it do narrow as well? There are "begin and end " decade switches ,will it perform as a sweep gen?

Sorry lots of questions. Nice piece of test gear.

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Posted : 13/07/2017 12:07 pm
Marc
 Marc
(@marc)
Famed V-Ratter Registered

Very nice bit of kit Andrew, your certainly building up a nice collection of test gear now thumb_gif

Marc.

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Posted : 13/07/2017 12:22 pm
PYE625
(@pye625)
Famed V-Ratter Registered

nuvistor said
It appears to have a Stereo Encoder built in, is that correct? Is it wideband FM or will it do narrow as well? There are "begin and end " decade switches ,will it perform as a sweep gen?

Sorry lots of questions. Nice piece of test gear.  

Hi Frank, yes it has a stereo encoder, and as far as I remember, it is wide FM. The decade switches are to select a range of pre-programmed signal conditions that can be stored in memory and can be retrieved quickly by rotating the dec-inc dial and pressing recall. If working, this is a useful feature and avoids lots of fiddling about when several differing signals are required. 

I will try and obtain a manual for this as I learned how to use it at work by purely trial and error lol 
 

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Topic starter Posted : 13/07/2017 12:34 pm
PYE625
(@pye625)
Famed V-Ratter Registered

marc said
Very nice bit of kit Andrew, your certainly building up a nice collection of test gear now thumb_gif

Marc.  

Thanks Marc, it was a pure chance that I happened across this item, I can't even remember exactly where I was browsing on ebay.

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Topic starter Posted : 13/07/2017 12:41 pm
PYE625
(@pye625)
Famed V-Ratter Registered

freya said
Very nice bit of kit, and a great price !  

Let's hope it is fully operational..... watch this space  grin_gif

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Topic starter Posted : 13/07/2017 12:42 pm
Cathovisor
(@cathovisor)
Illustrious V-Ratter Registered

Again, it looks very useful with the added bonus of a stereo encoder. I acquired a Heathkit stereo generator from the Wireless Museum for a couple of quid which is going to need a little work to restore functionality; currently I have an Armstrong tuner-amplifier which will not decode stereo despite working through some bodges and blinders on the decoder introduced by 'enemy action'. I noticed that the cores in the detector transformer had been 'got at' and I wonder if the alignment has been compromised enough to lose the 19kHz pilot tone; the decoder in the Armstrong is directly driven by doubling the 19kHz tone to get 38kHz to drive the switching elements - a pair of AF11whatevers.

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Posted : 13/07/2017 12:57 pm
PYE625
(@pye625)
Famed V-Ratter Registered

Hi, well I am now in possession of the user and service manual for the LSG-216. (Plus 330PDF files of other Leader equipment).

I obtained them via an electronic download from this company.....

www  ultimateservicemanuals  com

There is a MASSIVE range of manuals that maybe purchased from them and their site is well worth a browse.

(For instance, the Philips vintage audio, radio and TV DVD (or download) contains a whopping 2340 service manuals alone. All for about £16.00).

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Topic starter Posted : 13/07/2017 6:04 pm
PYE625
(@pye625)
Famed V-Ratter Registered

Hi,

Today it arrived and does appear to operate as it should, you never can be quite  sure, so am very pleased.

rsz_img_3045.jpgrsz_img_3046.jpgrsz_img_3047.jpgrsz_img_3048.jpgrsz_img_3052.jpgrsz_img_3049.jpg(470khz carrier, then AM followed by FM)rsz_img_3050.jpgrsz_img_3051.jpg

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Topic starter Posted : 17/07/2017 8:20 pm
Mikey66 liked
alleyoop
(@alleyoop)
New V-Ratter Registered

@pye625:

@pye625

I'm currently servicing my old faithful LSG-216 as it has developed several age related problems as:

  • memory loss (NiCd memory battery)
  • quirky attenuator (4 relays inside VCO module)

 

I solved all these problems but I'm still trying to locate the main reference crystal oscillator (with a trimmer capacitor) as the generated frequency is off by about 55kHz on the 75-115MHz band. Some help from someone who owns the service manual would be greatly appreciated.


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Posted : 02/04/2021 3:04 am
Cathovisor
(@cathovisor)
Illustrious V-Ratter Registered

@alleyoop

Get in touch with Leader directly - they're very good on service manuals. 

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Posted : 02/04/2021 9:31 am
Katie Bush
(@katie-bush)
Illustrious V-Ratter Moderator
Posted by: @marc

Very nice bit of kit Andrew, your certainly building up a nice collection of test gear now thumb_gif

Marc.

That it is, and sort of kicks my humble function generator into the trashcan! - Just when I thought I was finally going places too! 💥🙀🤦

 

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Posted : 02/04/2021 7:21 pm