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Marantz 2240B – new object of (visual) desire :-)

Heller

Heller

Active Member
Hello everybody!

I’m about to start a visual, artistic re-creation of the Marantz 2240B front view. Could I find some support here, in terms of good high-res photos of that receiver?

The result will be following the style of my recent creations:

Heller

Post in thread 'Fun project: Creating an illustration of SX-1980’s front panel'

All right – so the Pio finally qualifies to be the new member of my humble HOF :cool:

See the size (and weight) of that thing o_O


HOF+1.jpg
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Heller

Post in thread 'Japanese reel-to-reel tape recorders from the late 1970s'

Almost there ...

FT_109_Sony-TC-765_766-2-Nachbau.png
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This will again be a private, non-commercial fun project.

Thanks a lot!
 
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Using the font »Davison Spencerian« for the script parts of the lettering seems to be a good choice. Still, the capital letters M, B, S and R need to get some extra work.

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Recreating one of those FM/AM tuning scales always gives me headaches (See a b/w version of what I’ve built up so far for my 2240 B)

I don’t understand the »logic behind« the FM scale. The spacing between the given values (88, 90 … 108) makes no sense to me. Had it »analyzed« by ChatGPT: It does not seem to understand it just the same :crazy:

b-w-scale.jpg
 
Heller said:
Recreating one of those FM/AM tuning scales always gives me headaches (See a b/w version of what I’ve built up so far for my 2240 B)

I don’t understand the »logic behind« the FM scale. The spacing between the given values (88, 90 … 108) makes no sense to me. Had it »analyzed« by ChatGPT: It does not seem to understand it just the same :crazy:

View attachment 3682859
Click to expand...
Google's AI does a decent job:

AI Overview



The FM radio scale (88–108 MHz) is designed to provide high-fidelity audio by using wide, 200 kHz channels within the VHF radio spectrum, preventing interference between stations
. Frequencies are centered on odd decimals (e.g., 88.1, 88.3) to allow for a 100 kHz buffer on either side, reducing overlap in the 88.0–108.0 MHz range.
Key Aspects of the FM Scale Logic:
  • Frequency Range: The 88–108 MHz band was designated by the FCC in 1945 for superior, interference-resistant, wide-band audio.
  • Channel Spacing: Each station operates within a 200 kHz channel, with a 75 kHz deviation on either side of the center frequency.
  • Odd Decimals (.1, .3, .5, .7, .9): To maximize space, the center frequencies are separated by 200 kHz, starting at 88.1 MHz. For instance, an 88.1 MHz station operates within 88.0–88.2 MHz, leaving a 100 kHz buffer for the next station starting at 88.3 MHz.
  • Methodology: Unlike AM (Amplitude Modulation) which changes power, FM (Frequency Modulation) changes the frequency of the carrier wave to encode audio, reducing noise from electrical interference.
  • Range Limitations: FM uses "line-of-sight" propagation, meaning signals are generally limited to about 50–100 miles, as they are blocked by terrain.
 
I added (strongly enlarged) bars to visualize the deviation of the different spaces within the MHz pairs. As you can easily see: the 90/92 space is the smallest, while the 106/108 space is the largest.

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Regarding the phones/dubbing sockets – is that a gap in reality, between the metal front panel and the socket body itself?

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I've never really looked at it that closely, but I believe it is just a gap. I'll check later tonight if you still need it.
 
I found a picture of a 2230 I've been doing a little work on and it looks like there is both a space there and a little black plastic ring. Here's as good of a picture I can make out of it.
 

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Final step was giving a slightly different angle to all those »reflection-propellers« on top of each knob or screw. Compare »selector« to »volume« here:

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