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GW Instek GRG450B RF Signal Generator

Discussion in 'General Ham Radio Discussion' started by Onelasttime, Jan 11, 2018 at 11:47 AM.

  1. Onelasttime

    Onelasttime
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    So I was going to buy a used one off of Ebay for $79 then I found a place that has 4 NOS for $160.



    It is a close clone of the BK Precision 2005B. I do know if BK Precision made them for them doubtful. More likely they made the BK Precision Line for BK and their own house brand in Taiwan on the same assembly line. They are a few differences between them but they could easily be kissing cousins.

    In the past, they retailed between $299 and $239.

    I am not working on radar units, microwave transmission sites or any other such nonsense where I need $1200-$4000 unit.

    Before I ordered my unit this morning they had 4 listed for sale so that is not 3 available for sale. Early bird get's the worms! LOL
     

  2. Low_Boy

    Low_Boy
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    I had the digital version of that signal generator. In fact I still have one. By digital it has a LED readout on the front and it is useless for CB radio work it drifts all over the place. I would love some other comments on this if any one else has used one. I was going to use the one I have to put a 1K tone in to the microphone socket of a radio for testing.
     
  3. loosecannon

    loosecannon
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    another CB radio and a 1K tone generator is much cheaper, and more stable than one of those things.
    If you are working on CB radios, that's all you need until you step up to something with a calibrated output.
    LC
     
    Robb likes this.
  4. Onelasttime

    Onelasttime
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    I thought about that too. Yes a single and double tone audio tone generator is simple to build from your junk drawer parts.

    I do not know what I will be working on in the future.

    I am sure that with some warm up and some tweaking it will be usable. I have used similar units from the 1950 and 1960's. If I figure out any tricks to get it stable I will post about it.

    Most of these type of units need to be running a while to settle down. True all of this kind of generator have drift issues. Millions of this type of RF Generator has been sold for decades all over the earth.

    In fact I have seen similar types of units with NASA tags on them in Surplus! LOL I shudder to think what they where doing with them! LOL

    Want a good laugh at NASA's expense???
     
  5. Robb

    Robb
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    Had one of those same sig gens. Didn't stay on freq at all and no way to adjust the output with any certainty of it staying put. Ended up giving it to a friend. Guess its better than no generator; but not by very much - IMO. Got a Hp 8656B to replace it and never had to look back - does everything with accuracy and is dependable. Of course I paid 3x more than you did; but in hindsight it was worth it. I'm sure you'll figure this all out yourself in a short time.
     
    #5 Robb, Jan 12, 2018 at 5:04 AM
    Last edited: Jan 12, 2018 at 7:53 AM
  6. Low_Boy

    Low_Boy
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    The Instek will end up being pure aggravation. Is the main use for that style of signal generator is for antique AM FM radios.
     

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