- You must be logged in to reply to this topic.
I’ve just finished the electronics on an RCA Victor Model T4-2 and it’s functioning quite well. However, I’d like to tweak the alignment but I don’t understand the cryptic alignment instructions. All it says is
R.F. 1400 KC
IF 460 KC
Peak All Stages
I have to make some assumptions here, because I don’t know what this radio looks like inside:
1. L2 and C1/C2 tune the frequency being received;
2. L3 and C6/C5 tune the oscillator frequency.;
3. C1 and C6 are ganged so that the oscillator tracks the received frequency giving an IF of 460KHz into L5/L6;
4. All heaters are connected in parallel.
If that is all the case, I would first peak the IF by removing Tube 1 and injecting 460KHz from a signal generator into the L5/L6 transformer via a loosely coupled coil, peaking with C9. Peaking could be by oscilloscope or simply by audio level.
Then I would insert tube 1, tune the dial to 1400KHz and inject 1400KHz into the antenna, again via a coupled coil, to L11. I would then peak that signal with C2, then peak it again with C5, and again with C8.
Of course, this might all be rubbish!
Click on the different category headings to find out more. You can also change some of your preferences. Note that blocking some types of cookies may impact your experience on our websites and the services we are able to offer.
These cookies are strictly necessary to provide you with services available through our website and to use some of its features.
We provide you with a list of stored cookies on your computer in our domain so you can check what we stored. Due to security reasons we are not able to show or modify cookies from other domains. You can check these in your browser security settings.
These cookies collect information that is used either in aggregate form to help us understand how our website is being used or how effective our marketing campaigns are, or to help us customize our website and application for you in order to enhance your experience.
If you do not want that we track your visit to our site you can disable tracking in your browser here:
We also use different external services like Google Webfonts, Google Maps, and external Video providers. Since these providers may collect personal data like your IP address we allow you to block them here. Please be aware that this might heavily reduce the functionality and appearance of our site. Changes will take effect once you reload the page.
Google Webfont Settings:
Google Map Settings:
Google reCaptcha Settings:
Vimeo and Youtube video embeds:
The following cookies are also needed - You can choose if you want to allow them: