[Premium-Rx] Looking for recommendations on high performance VLF receiver.

[Al Klase]

YES,- I suggest concentrating on your antenna system, rather that 
seeking some magic receiver.  How much better than the 357 do things get?

Al

On 4/9/2018 10:45 AM, Bruce Gentry wrote:
> In addition to having a good receiver, a good (quiet) location and 
> antenna are also needed.  How many people go on "RXpeditions" for 
> VLF?  As for receivers, how would a classic TRF/regen receiver like an 
> RBA or RAK work for you?  The detector bandwidth narrows as you 
> approach oscillation, and the RAK has sharp audio filters. The reason 
> I ask about these receivers is their simplicity, "purity", and lack of 
> conversion noise along with good sensitivity. The Collins R-389 and 
> many others have a lot of internal noise.
>
> On 4/9/18 2:06 AM, Tom wrote:
>> Hi Folks!
>>
>>
>>    I've been having a blast pulling in VLF aircraft beacons in the 
>> 200-525 K/c range.
>>
>>    I am looking for recommendations for a premium receiver that will 
>> cover VLF. If it can cover say VLF to HF (maybe 10k/c - 30 Mc, that 
>> would be even better!)
>>
>>    Due to the nature and spacing of the signals, selectivity is an 
>> absolute must!  Signals can typically be 2 K/c apart from each other, 
>> creating all sorts of heterodyne issues.
>>
>>    My best receiver is the CEI-357 (R-1401): Sensitivity is good, 
>> selectivity is also quite good, but the noise blanker doesn't seem to 
>> work, and this a real performance killer (especially since we're 
>> getting into the noisy time of year!).
>>
>>    The CEI-357 has 6 K/c, 3 K/c, 1 K/c, and 100 Hz filters. For VLF 
>> work, the 3 and 1 K/c filters are what I primarily use. The 1 K/c 
>> filter gets used the most. Being able to use a .5 K/c filter would be 
>> a huge asset for pulling in the Canadian beacons that have the 400 Hz 
>> modulation.
>>
>>    Having the ability to go from AM to USB and LSB is also a huge 
>> plus: I bagged a beacon in the Caribbean (a 3900 mile path!) because 
>> I was able to switch to SSB and use a narrow filter.
>>
>>    Thanks in advance for your suggestions.
>>
>>
>> -Tom
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>
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-- 
Al Klase – N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/