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Coil - Miniature adjustable coil, 70, R.F. stage

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Item ID: 005494
Price: $14.95
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Coil is similar to Miller number 70-RF. Coil is similar to Miller number 70-RF R.F. stage coil. Their small physical size and the fact that they can be adjusted to the inductance required make these coils ideally suited for replacement in broadcast band receivers. The R.F. coils have high impedance primaries and wire wound secondaries for use with any variable condenser having a maximum capacity between 250 and 450 mmf. These coils are for use in all common padded and unpadded oscillator circuits.

For the oscillator coil, see P-C70-OSC

UPC/EAN: 609722162500
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Specifications, Files, and Documents

Product Reviews

4.80 out of 5 based on 5 reviews
5 out of 5

The RF primary was a very good replacement for the 2nd IF volume control used in the Silvertone 1984 radio. The original stationary part of the coil assembly was damaged. The original coil needed to be striped and rewound. I decided to look for another option. The primary side of the RF coil was very close to the inductance required to work with the receiver circuit at 175KHz.
Glue it to the frame. Made the tuning adjustments. Works fine. This is not a ideal restoration.
It allows me to complete any other problems the radio may have while I rewind the old coil.

- March 12th, 2020
4 out of 5

Seems to be of good quality, but it would be nice if it had the same style of slug and mounting clip as the Miller part number it replaces...

- March 31st, 2019
5 out of 5

This coil has a very wide range, Has the possible capability of being a replacement IF transformer, Can be easily modified to work in the Longwave spectrum by adding a 390 or 500 pf capacitor across the variable cap. terminals.

- January 29th, 2019
5 out of 5

I ordered 7 of these coils, to be sent to me, here in New Zealand. I needed at least 3 to replace RF coils in radios I have here that needed to be retuned to receive a station on 531Khz (the radios previously only tuned down to about 550Khz). Unfortunately, the original coils in these radios have a fixed ferrite slug, and weren't easily re-tunable. When I did manage to free the slugs for re tuning, I found the gain through the old coils to be woefully low. Experimentation showed that substituting a piece of ferrite rod aerial improved the gain a lot, but I couldn't figure a way to sucessfully attach a brass adjusting screw to the ferrite, so the coil could be accurately tuned once installed back in to the radio. It was by pure luck that I 'came across' the 'Antique Electronic Supply' web site, and a search of the site showed that new (and fully adjustable) RF coils were stocked. I placed an order for 7 on the 28th December. I was absolutely amazed that they arrived to me on the 5th January - 8 days later, which included a weekend (and two public holiday days for us, here in New Zealand. Absolutely outstanding service from Antique Electronic Supply. I also must add that Justin answered (my sometimes pointless) emails promptly and courteously too.
I wasted no time in temporarily installing one of the coils in to a radio, and I was very impressed that it worked exactly as I expected it to. It tuned up beautifully.
Thank you Justin and Antique Electronic Supply. I will be buying from your company again soon.
Peter W, New Zealand

- January 18th, 2016
5 out of 5

Well made coil The core racks well when "adjusting the slug". Very happy with this product!

- August 30th, 2015

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