This table shows the signficant technical features of set in our collection and highlights the similarities and differences
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British Sets |
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TRF/Superhet |
Channels |
RF Amp |
Deflection |
Notes |
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| Baird |
T18C |
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Superhet |
1 |
N |
Mag |
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| Cossor |
1210 |
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Superhet |
1 |
Y |
Mag |
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| Cossor |
137T |
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TRF |
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Elect |
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| Cossor |
54 |
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Superhet |
1 |
Y |
Elect |
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| Ekco |
TA201 |
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TRF |
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Mag |
Ext sound |
| HMV |
1800 |
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Superhet |
1 |
Y |
Mag |
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| HMV |
900 |
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TRF |
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Mag |
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| HMV |
902 |
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TRF |
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Mag |
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| HMV |
904 |
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Superhet |
1 |
Y |
Mag |
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| HMV |
905 |
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Superhet |
1 |
Y |
Mag |
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| HMV |
907 |
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Superhet |
1 |
Y |
Mag |
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| Marconi |
705 |
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TRF |
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Mag |
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| Marconi |
701 |
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TRF |
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Mag |
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| Marconi |
702 |
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TRF |
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Mag |
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| Marconi |
703 |
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TRF |
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Mag |
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| Marconi |
706 |
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Superhet |
1 |
Y |
Mag |
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| Marconi |
707 |
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Superhet |
1 |
Y |
Mag |
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| Marconi |
709 |
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Superhet |
1 |
Y |
Mag |
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| Murphy |
A58V |
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Superhet |
1 |
Y |
Mag |
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| Pye |
815 |
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TRF |
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Mag |
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| Pye |
817 |
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TRF |
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Mag |
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| RGD |
382-RG |
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Superhet |
1 |
Y |
Mag |
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American Sets |
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TRF/Superhet |
Channels |
RF Amp |
Deflection |
Notes |
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| Andrea |
1-F-5 |
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Superhet |
2 or 3 |
N |
Elect |
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| Andrea |
KT-E-5 |
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Superhet |
2 or 3 |
N |
Elect |
Kit |
| Andrea |
8-F-12 |
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Superhet |
5 |
N |
Mag |
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| Bell & Howell |
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Superhet |
Continuous |
Y |
Mag |
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| DuMont |
180 |
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Superhet |
4 |
Y |
Mag |
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| GE |
90 |
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Superhet |
5 |
Y |
Mag |
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| GE |
HM-171 |
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Superhet |
3 |
N |
Elec |
Ext sound |
| GE |
HM-185 |
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Superhet |
3 |
N |
Elec |
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| GE |
HM-225 |
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Superhet |
5 |
N |
Mag |
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| GE |
HM-226 |
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Superhet |
5 |
N |
Mag |
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| Meissner |
10-1153 |
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Superhet |
3 |
N |
Elect |
Kit |
| RCA |
TRK-5 |
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Superhet |
5 |
N |
Elect |
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| RCA |
TT-5 |
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Superhet |
5 |
N |
Elect |
Ext Sound |
| RCA |
TRK-9 |
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Superhet |
5 |
N |
Mag |
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| RCA |
TRK-12 |
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Superhet |
5 |
N |
Mag |
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Similarities: |
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| All have "brute force" CRT high voltage (EHT) |
| Both countries made a few models requiring an external audio output section and speaker |
| Both countries made models with electrostatic and magnetic CRTs. However, in the US there were only a few |
| types of CRTs (mostly made by RCA) while there was a great variety of CRTs in Britain. |
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Differences: |
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| All British sets, whether superhet or TRF, tuned only one channel. American sets could select 3-5 channels |
| Kit sets were made only in the US |
| Most US sets did not have a RF amplifier, while all British superhet sets had one |
| Some British sets used thyratrons for horizontal (line) and vertical (frame) oscillators. |
| The only US set to use a thyratron was Philco. |
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