[time-nuts] Looking for Harris/Qbit amplifers

Bruce Griffiths bruce.griffiths at xtra.co.nz
Thu Jan 26 02:29:40 EST 2012


The Q-bit amplifiers tend to use directional coupler feedback as 
detailed in several of their patents.

Bruce

John Ackermann N8UR wrote:
> Hi Rob --
>
> Thanks for the pointer.  I should have been more detailed -- I was 
> hoping to find the same model number as I'm building several copies of 
> a signal chain and wanted to use the same amp block in each; I already 
> have a couple of these units and know they'll do the job, so was 
> hoping to just snag a couple more.
>
> And, what was attractive about this unit for my application is that 
> the P1dB is about +25dBm which is ideal for the driver application I 
> have. Don't need a lot of gain, or frequency above VHF.
>
> But thanks for the lead, it's appreciated.
>
> John
> ----
> Rob Kimberley said the following on 01/25/2012 11:57 AM:
>> John,
>>
>> How about these on EBay, Item : 110803140186
>>
>> Cheap and plenty in stock.
>>
>> I've just ordered 4 to experiment with.
>>
>> Rob Kimberley
>>
>>
>> -----Original Message-----
>> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
>> Behalf Of John Ackermann N8UR
>> Sent: 24 January 2012 18:08
>> To: Discussion of precise time and frequency measurement
>> Subject: [time-nuts] Looking for Harris/Qbit amplifers
>>
>> Several years ago eBay offered some nice amplifier blocks that went 
>> up to
>> 500 MHz with about 10dB gain and 25dBm maximum output.
>>
>> The part number on the unit is Harris 0130-211013, but they were sold as
>> "Qbit 512".
>>
>> I got a couple back then, and would now like to find two or three 
>> more to
>> use in a project.  Of course, the eBay source is long gone.  There's not
>> much in the way of Google hits other than the page I put up with some 
>> test
>> results.
>>
>> Anyone have any of these squirreled away, or know where any might be 
>> found?
>>
>> Thanks,
>>
>> John
>>
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