Radio Road

Which tuner to get and getting the most from it. Thank God, for the radio!

Return to Radio Road

Message Sort: Post Order or Asylum Reverse Threaded

I just ordered a product detector board for my one of R390A receivers

97.95.45.221
Posted on April 20, 2014 at 18:08:21
Michael Samra
Dealer

Posts: 36118
Location: saginaw michigan
Joined: January 30, 2005
 Terry DeWick bought one for his R390 and this video I found shows it to work rather well.I did modify the product detector 26 years ago in one of them and it works ok,but now I should probably put it back to original or put the new board in my other R390A which isn't as nice as the one I modded.It was 32 steps and I found the sheet but maybe I can try it in the unmodded one and compare it..I am using a 70v transformer as all these military boat anchors are 600ohm out.

"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken

 

Hide full thread outline!
    ...
RE: I just ordered a product detector board for my one of R390A receivers, posted on April 22, 2014 at 17:34:30
radioactive
Audiophile

Posts: 196
Location: winnipeg,manitoba
Joined: March 15, 2001
 You have 2 r390A's? And here i thought you were just hoarding tube amps lol.as far as the audio output have you tried the ring diode as i think its called.?im not lucky enough yet to own a390 but hope too someday.as for the treetop go for it i watched the video and it seems to do a good job and stays stable.whatever yo decide goodluck im off to put together my pixel technologies pro 1b magnetic loop i got in the mail yesterday and try it out on my collins hf-2050.73's,
chris
real radios glow in the dark...

 

This is potentaillya good wide-band audio AM receiver for the broadcast band? , posted on April 22, 2014 at 22:03:41
Timbo in Oz
Audiophile

Posts: 23221
Location: Canberra - in the ACT - SE Australia
Joined: January 30, 2002
 How wide is the audio bandwidth?

Do you have to add that NRSCA post reception Eq so that it doesn't sound shrill? All AM BCB statiosn use the NRSCA pre-boost. The inverse shape is needed to compensate.

Or are Mr Rippell's mods sufficient.

We have a few very good wide-band audio transmissions on the AM BCB, and I've put a fair effort into getting good sound from my old valve RF stages 'tunah'. Search here.


Warmest

Tim Bailey

Skeptical Measurer & Audio Scrounger


 

RE: I just ordered a product detector board for my one of R390A receivers, posted on April 23, 2014 at 05:51:50
Michael Samra
Dealer

Posts: 36118
Location: saginaw michigan
Joined: January 30, 2005
 I don't have as many Boatanchors as tube amps but I have the critical ones and I want to get an Hallicrafters SX-88 and I will be happy.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken

 

RE: This is potentaillya good wide-band audio AM receiver for the broadcast band? , posted on April 23, 2014 at 05:55:29
Michael Samra
Dealer

Posts: 36118
Location: saginaw michigan
Joined: January 30, 2005
 Tim
The audio amp itself will go out to 10k I would guess even tho you only need 3k for vocals.I use the receiver for general coverage and when I'm on 3.880 75M AM phone.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken

 

RE: I just ordered a product detector board for my one of R390A receivers, posted on April 24, 2014 at 11:10:48
Brian Levy
Audiophile

Posts: 2438
Location: Toronto
Joined: June 5, 2000
 Looking at threads like this is not good for my drool factor!
Don Brian Levy, J.D.
Toronto ON Canada

 

Page processed in 0.023 seconds.

[ Top Top of Page ] [ Contact Us ] [ Support/Wish List ] [ Copyright © 2024, Audio Asylum, all rights reserved ]
[ General ] [ Speakers ] [ Tubes ] [ Vinyl ] [ Digital ] [ Hi-Rez ] [ Video Asylum ] [ Cables ] [ Tweaks/DIY ] [ Music ] [ Films ]