- July 14, 2017 at 4:09 pm #9405
Jordan DobrikinForum Participant
Welcome, Jordan Dobrikin
Semiconductor replacement of tubes in Antique pre 1930’s radios
Tagged: Antique Tube Radios, Steampunk, Transistorize
July 14, 2017 at 4:02 pm
Looking for comment, advice, assistance retrofitting transistorizing pre 1930’s Tube Radios to lower safer voltages
Are these suitable
RF Amplifier PC Board 2N5109 PC Board or Kit
DC 12V 10KHz-1GHz 10dBm RF Broadband Low Noise Amplifier LNA Module HF VHF UHF
AntiqueRadio Tube Replacment/Substituion
I am seeking help, advice assistance and comment on replacing ALL the Tubes in Antique Radios with Transistor/Semiconductors that will operate at lower, safer voltages.
The main target is the RF Stages of TRF Radios and to a lesser extent Regenerative Receivers.
Detection and Audio will be handled by a simple Detector (Crystal) and Audio Amplifiers on a small PC Board readily available on Ebay.
I want to explore the idea of using Radios on a Chip and receiver PC Boards using “Radio on a Chip” chips. Picking up the RF at the input to the detector/audio amplifier and shunting off theunused audio to ground
TRF radios with 2, 3, & 4 Tuned RF Stages; like the Atwater Kent Models 20C and 30
Regenerative Receivers Radiola III, Radiola IIIA and Westinghouse RADA
73 de Jordan ve7jjd
STEAMPUNK Radios/Receivers: Crystal TRF & Regenerative
Objet d’art Plural Objets d’art
Radios: Building Crystal TRF and Regenerative Radios using Antique/Vintage Components, along with modern electronics and components (Transistors, Semiconductors, Radios on a Chip, Op Amps) to come up with Objets d’art Sculptures that are also highly functional Radios.
(Variometers, Variocouplers, Cats Whiskers, Variable Condenser/Coil Assemblies, Vernier Dials)
Receiverstransistorize: Retrofitting Antique Receivers/Radios, Crystal, TRF and Regenerative to operate sans Cabinetry at safe, low voltages. Both Hollow-state and/or Solid-state.
Atwater Kent Model 20C (original tubes: UX 201A & UX 200A)
Radiola III (original tubes: WD 11; UX 199; UX 120)
Radiola IIIA (original tubes WD11; UX 199, UX 120)
Westinghouse RADA (original tubes UV 200, UV 201, WR 21)
Metrodyne Super FiveJuly 18, 2017 at 12:46 pm #9425
Gary AlbachCVRS Member
Hi Jordan – sounds like you are mainly interested in solid-state replacements for 01A tubes as used in the AK 20C and AK30, and for WD11 tubes as used in the Radiolas. A popular replacement for the 01A is a circuit using a small light bulb and a photoresistor with an FET, with a detailed discussion here:
One point noted in the ARF thread is that you might expect to have to do some tweaking of each stage in a TRF to get it to work properly with all SS replacements.
For WD11 replacements in my Radiolas, I have recently fabricated substitutes using miniature 5676 tubes inside cut-off test tubes attached to custom bases, and hopefully will publish the construction details in a future issue of the CVRS Newsletter. I haven’t found an FET circuit to substitute for the WD11 so have taken it as a challenge to come up with one for the Newsletter at the same time.
In general, the SS replacements I’ve tried work quite well. The solid-state 1L6s in my TransOceanics give better performance than the original tubes.
You also mention trying ‘Radios on a Chip’. Not sure how you will get at the input to the detector inside the IC package, but the venerable MK484 chip (now TA7642) is available on eBay at 10 for a US dollar (with free shipping!).
GaryJuly 19, 2017 at 9:00 am #9426
Gary AlbachCVRS Member
Hi Jordan – here are the links from my last post:
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