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24511

Re: My Regen is nearly completed, hum greatly reduced. (long winded

Oh, and my comments about separate PS and audio output stage assumed the construction of vintage tube equipment, not solid-state. Sent from my iPhone
John
4:37 AM
#24511
 
24510

Re: My Regen is nearly completed, hum greatly reduced. (long winded

Yeah, that was a goof -- somehow I managed to paste that and send all in one motion. Goodness knows how long that was in the paste buffer. At least it wasn't
John
4:32 AM
#24510
 
24509

Re: Really Stupid Question

... You're right; I read "stator" but thought "rotor", and off I went! Thanks for the correction! Best regards, Dave amateur radio W9BRD
davidpnewkirk
10:47 PM
#24509
 
24508

Re: My Regen is nearly completed, hum greatly reduced. (long winded

Oh.... wow! Super-cool!!! Where can I find the schematic for one?? Amazing Tales of SR-71 Blackbird Plane http://www.chonday.com/Videos/sr71jetplane1
qrpbear
10:03 PM
#24508
 
24507

Re: My Regen is nearly completed, hum greatly reduced. (long winded

The nice thing about a separate power/supply (and, optionally, audio output stage) is that you can use it on many sr71jetplane1receivers, and you don't tax
John
7:10 PM
#24507
 
24506

Re: Really Stupid Question

I think we have this backwards. The rotor (movable part) has bearings in the frame and the shaft is commonly brought through the panel in a bushing which is
Richard
6:36 PM
#24506
 
24505

Re: My own "Stoopid Question" ;-)

FWIW.... When I have used traps in the past I have found series-tuned shunt traps work best when used across relatively low impedance inputs/outputs while
qrpbear
6:25 PM
#24505
 
24504

Re: Increasing Receiver Sensitivity

... Noise you're not listening to is noise you can't hear. Therefore noise _outside the passband_ of your receiver is noise that doesn't matter--assuming that
davidpnewkirk
5:32 PM
#24504
 
24503

Re: Increasing Receiver Sensitivity

Thanks for the input. Those methods work very well for a broadcast receiver or one where the tuning range is wide compared to the frequencies in use. For
J Ed
5:26 PM
#24503
 
24502

Re: Really Stupid Question

... Ok... I know that electrolytic caps are polarized so they are wired with the negative lead connected to ground and that fixed caps can be wired either way
davidpnewkirk
5:22 PM
#24502
 
24501

Re: Increasing Receiver Sensitivity

Hi Ed, Comments below. Cheers, Will. On 29/07/15 04:25, J Ed jedwardsat1@... [regenrx] wrote ... The normal way is to use a different coil value and an
Will
4:04 PM
#24501
 
24500

Re: My own "Stoopid Question" ;-)

Hi Phil, You could always put it in series with the input rather than in parallel. Or make a tee trap. Plenty of helpful advice in ARRl or RSGB handbooks.
Will
3:43 PM
#24500
 
24499

Re: My own "Stoopid Question" ;-)

Very interesting quandry, Phil ! Dave is the GG guru, so I trust he will respond. As a has-been, I would just try the wave-trap and see. It won't blow up...
Michael
3:07 PM
#24499
 
24498

Re: Really Stupid Question

While it is normal to mount the frame (Rotor) of Variable capacitor to the chassis that can lead to microphonics if the circuit that it is in is used as an
Will
2:32 PM
#24498
 
24497

Re: My Regen is nearly completed, hum greatly reduced. (long winded

Aluminum is indeed a "good enough" conductor, but the perenial problem is making a good electrical connection. Aluminum when exposed to air quickly forms
Richard
2:02 PM
#24497
 
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