About Us

D. Peter Maus[_2_] · November 11th 11, 05:57 PM posted to rec.audio.tubes,rec.radio.shortwave

On 11/11/11 24:15 , wrote:
On Nov 11, 12:04 am, David
wrote:
My guess is that the cost you would have to charge to recoup the time
and effort you put together in coming up with such a design would end
up making such a set *much* more expensive than just going to a ham
fest, buying a Hammarlund in good shape, and fixing it up. Or even
paying someone else to fix it up.

I already have a R-390, two Hammarlunds and a Racal....I wanted to
manufacture something. Or at least think about it.

Certainly worth thinking about.

Maybe worth doing. But consider:

Tubes are getting harder to come buy. Not that they can't be had.
And after an EMP, they're likely to be as available as working SS
devices. But there are inherent issues with Tubes. One is that they
use a LOT of precious energy, that in a survival mode situation is
best conserved for other applications, or longer listening. Another
is that voltages are much higher than those that can be recovered
after or during a crisis with ease. Low voltage, low current devices
are going to be more desirable when energy is in short supply.

But, more importantly, tube receivers aren't necessarily less
prone to damage by EMP than SS receivers. In fact, there is
empirical evidence to suggest that SS receivers can be made to
survive an EMP where a tube receiver will not.

Your best options, then, would include building a reasonably high
performance receiver with readily available common parts, and take
measures, such as a Faraday cage, and effective grounding/input
protection measures, to render your station if not immune, then more
resistant to stray or induced hostile voltages.

Now, you have a practical, and manufacturable, product.

Thread Tools	Search this Thread
Show Printable Version	Search this Thread: Advanced Search
Display Modes
Switch to Linear Mode Switch to Hybrid Mode Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
WWRB shortwave : Our You tube video: The Four Course Radio Range	radio stationWWRB	Shortwave	1	May 9th 10 03:01 PM
everyone better be careful while building those shortwave radios	[email protected]	Shortwave	9	April 14th 08 09:50 PM
Building a Multi-Element 1/4 Wave Length Shortwave Listening (SWL) Antenna	RHF	Shortwave	0	August 12th 07 05:24 AM
Classic Shortwave Antenna for a Classic {Tube} Shortwave Radio / Receiver	RHF	Shortwave	13	May 1st 06 07:22 AM
Better hold on to your shortwave TUBE radio	radioman390	Shortwave	25	May 2nd 05 01:13 AM

Menu

About Us