[Boatanchors] OT: Which LED lamps are good and which ones bad (From a Radio noise standpoint)

[Dennis DuVall]

In my shack with a wire connected to the antenna input on my solid state transceiver and the other end wrapped around the bulb:

1. Incandescent — no hash, 75 - 10M

2. CFL — hash if wire wrapped around the element, a bit louder at the base but NO hash 6” away.

3. LED — GE & Phillips.  Essentially the same results as with the CFL.  Nothing 6 inches away.

Longish thread on this back when the sale of incandescents in certain wattage ranges were banned.  Life as we knew it then did NOT end as feared and the current LED alternatives are great IMHO!

Dennis D.  W7QHO
Glendale, CA

*************

> On Dec 26, 2015, at 11:48 AM, Phil <ko6bb1 at gmail.com> wrote:
> 
> OK, I'm posting this to several lists (NOT cross-posting) as I want to have as much information at hand as possible before buying (they're not cheap).
> 
> I have a floor lamp immediately adjacent to my operating position, less than 12" from the SDR receiver.  As the lamp is typically on over 12 hours a day I actually 'prefer' to use a CFL in it (Edison Base) to keep operating costs down.  Problem is, the CFL generates "hash" in the SDR.  SDR is in a plastic case and the hash is picked up via the inductors in the add-on LPF, as well as any portable radios I set on the operating bench and listen to AM on (they have loopstick antennas).  Because of this I've been switching off between a CFL and the old style 60 Watt incandescent lamps (which I actually prefer, but they take more current and burn out regularly).
> 
> I've considered the purchase of LED lamps for that position as well as the ceiling lamps (takes 2).  The last time I looked they were very 'pricey', more than I'd like to spend on an 'experiment'.  BUT I thought I might go down to either Best Buy or Lowe's and see what they had in stock (Lowe's is probably the best place).
> 
> Before spending my money, I wonder if anyone could tell me what lamp brands are "RF Quiet" and more importantly, WHICH ONES ARE NOISY AND TO AVOID!
> 
> Thanks all, and HAPPY NEW YEAR. . .
> 
> -- 
> 73 de Phil,  KO6BB
> http://www.qsl.net/ko6bb/  (Web Page)
> 
> PRESENT RADIOS:
> Grundigs:    S-350 (~2006), G6 (2011) & S450DLX (2014).
> HOMEBREW:    7 Tube+Rect Regenerative RX for LF (built 2015)
> Icom:        IC-735 Transceiver (~1990).
> Icom:        R-75 With Cascaded 250 & 125Hz CW Filters. (~2005)
> Icom:        IC-7200 Transceiver (~2015).
> Radio Shack: DX-380 digital portable (~1990).
> SDR:         Softrock Ensemble II LF (built from a kit 2015).
> Zenith:      Royal-7000 Transoceanic Portable (~1968).
> 
> ACCESSORIES: HOMEBREW LF-MF Pre-Amp, MFJ-993B HF Auto-Tuner.
>             HOMEBREW 8 Hz Audio Filter.
> 
> ANTENNAS:  88 foot Long Ladder-line fed dipole at 35 feet AGL for MW/SW.
>           HOMEBREW Active Mini-Whip at 36 Feet AGL for LF/MW/SW.
>           HOMEBREW 37 foot "Low Noise Vertical" at 11 feet AGL for LF/MW/SW.
> 
> Merced, Central California, 37, 18, 37N   120, 30, 6W CM97rh
> 
> 
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