[time-nuts] OT - Old Hatfield 2105 Step attenuator specs

Alan Melia alan.melia at btinternet.com
Wed Jan 8 22:13:39 UTC 2014


Hi Alberto it is quite interesting to continue that test with no attenuator 
but the shells of the coax plugs connected together. I would guess with the 
gear you have the resultant would be at least 120dB down........but this is 
not the case for all signal generators! The result is usually particularly 
poor with "video" generators, and often laughable with function generators. 
This is were many LFers get confused calibrating receive equipment.

Alan
G3NYK



----- Original Message ----- 
From: "Alberto di Bene" <dibene at usa.net>
To: <time-nuts at febo.com>
Sent: Wednesday, January 08, 2014 8:50 PM
Subject: Re: [time-nuts] OT - Old Hatfield 2105 Step attenuator specs


> On 1/6/2014 2:13 PM, Giuseppe Marullo wrote:
>
>> /I would like to know the specs for this attenuator, especially the
>> maximum frequency, if any good folk has a ballpark idea...
>> I was not able to locate any info about it./
>
> I too have one, bought cheaply a couple of years ago on eBay. I tested its 
> accuracy
> with a calibrated RF generator and a Selective Voltmeter, both from W&G,
> at a frequency of approximately 10 MHz.
>
> Up to roughly 70 - 75 dB attenuation, it is reasonably accurate. Beyond 
> that
> value, the internal leakages dominates, and you can forget to have an 
> attenuation
> of 100 dB, when you set it to the maximum...
>
> 73  Alberto  I2PHD
>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to 
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there. 


---
This email is free from viruses and malware because avast! Antivirus protection is active.
http://www.avast.com




More information about the Time-nuts_lists.febo.com mailing list