526
Item nr.


National T-100 Portable

Full Short Wave coverage.


Data for National T-100
ProductionJapan, 1964.
Price was DM359.
BandsMW (560.7-186.9m), SW1 (187.5-65.2m), SW2 (62.2-25.0m), SW3 (25.0-11.5m).
Semi-
conductors
See Rmorg.
CabinetPlastic with leatherette. Size 33x23x11cm.
PowerBatt 7xD; draw 12-20mA from 6 cells, 7th is for dial lights.

The Design

In the early sixties, this was an over average short wave set. Sound quality is quite good with two speakers. All waves from Medium Wave to Short Wave are covered, including the Tropical and Pirate bands. There are several jacks to connect an aerial, ground, pickup, or loudspeaker.

I like the dial illumination: there are two lamps beneath the dial to lighten up the tuning, and one extra light for each band indicated which one is chosen. So three lights can light up at each time, and this happens when the button on top is pushed.


Obtained11/2020 from Gerard, Houten; sn=25087G.
Condition7; plays well, switch bridged, wrong knobs.
DisposedSold 5/2021.

This Object

The radio required some work, but I could handle most problems in a satisfactory way.

The power switch is defective and was bridged by an extra switch in the top of the set. Unfortunately, after dismantling and opening the switch, I found it irrepairable due to fractured parts in the switch. None of my stock switched could be mounted on the potmeter, and none of my switching pots were fit for the radio. So, repair of the switch has to wait location of a replacement switching pot. Also, the knobs were missing and the replacements from my stock are a bad match.

The dial chord was reversely stringed (so stations with high frquency were tuned at the left side of the dial), which I corrected. Also, there was some play in the tuning, which I repaired by fixing a spring to the cog wheels, and tightening the bolt in the capacitor axis. The tuning cap shorted on the lower third part of the dial, which I remedied by tilting the condensor plates a little.

I considered placing a DC jack to operate the set from a switched power supply, but found out that these supplies cause a lot of noise (as they do in many sets with germanium transistors) so I didn't do this. Some cleansing and polishing made the cabinet presentable.


Part of Gerard's Radio Corner.
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