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Item Information

Item condition:

Used few times and tested !WORKS !

Apr 06, 2014
Winning bid:
GBP 63.00
Approximately C $118.40(including shipping)
12 bids ]
GBP 48.00 (approx. C $90.21) International Tracked Postage | See details
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Leiden, Netherlands
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Item specifics

Condition: Used : Split the cost with friends
An item that has been used previously. The item may have some signs of cosmetic wear, but is fully operational and functions as intended. This item may be a floor model or store return that has been used. See the seller’s listing for full details and description of any imperfections. See all condition definitions- opens in a new window or tab
Seller Notes: Used few times and tested !WORKS !
Type: WORLD RECEIVER Frequency Band(s): HF
Brand: Kenwood trio Supported Modes: AM, SSB, CW
Model: 9R-59DS Manufacturer warranty: None
This week we will have some items at auction which we operated before we moved to another place and decide to put the radio hobby on a low level.
All items are from high quality and from a non smoking envirement and in prestine condition or different when mentioned in the text..
And great working order ofcourse !


The Trio 9R-59D and 9R-59DS are two slightly different versions of the same communications receiver manufactured by Trio (later Kenwood) Electronics in Japan during the years 1969-1974. The receiver is an 8-tube single-conversion design (455 kHz IF), covering from 0.55 to 30 MHz in four bands, and featuring a calibrated electrical bandspread for the ham bands. The receiver provided an excellent value for its cost (105 $ in 1971), since it had good selectivity (ceramic IF filter) and stability and included a product detector for SSB reception. For those reasons it became very popular especially with SWLs in Europe and many good units are still available for sale, mainly in Germany. 

I was not aware of the existence of the two different versions (maybe there is a third too, the 59DE), until when I purchased three of them on Ebay. It turned out that two were 9R-59D and one was a 9R-59DS. The only difference I could spot was a different front panel decoration (see pictures), more elaborate on the D, with a molded rectangular frame around the tuning dials and the S-meter. I believe that the 59DS is a more recent version. On the other hand the internals look exactly the same. Both types are equipped with SO-239 (UHF) antenna connectors. 

This receiver is of more modern desing than the predecessors like the Lafayette HA-230 and HE-30 (which was in fact also known as Trio 9R-59 outside USA). It uses two printed boards (IF and AF stages) and there are silicon rectifiers in the power supply. It is probably equivalent to the Lafayette HA-700, except for the different dial arrangement (slide-rule type in the HA-700) and the use of different tubes. 

The 9R-59D(DS) has a RF stage, S-meter, ceramic IF filter, tunable BFO and product detector. The stability is good and SSB reception is OK, much better than on the HA-230. The versions found in Europe are wired for 220 V power, so one does not need any external transformer. 


Tube complement

  • A 550-1600 kHz
  • B 1.6 - 4.8 MHz
  • C 4.8 - 14.5 MHz
  • D 10.5 - 30 MHz
  • V1 6BA6 RF Amp.
  • V2 6BE6 Mixer
  • V3 (1/2) 6AQ8/ECC 85 HF Oscillator
  • V4 6BA6 1st IF Amp.
  • V5 6BA6 2nd IF Amp.
  • V6 6BE6 Product detector
  • V7 6AQ8/ECC 85 BFO, 1st AF Amp
  • V8 6AQ5 Audio Output
  • Optional OA2 Voltage Regulator
Dimensions and weight: 18 cm high, 38 cm wide, 26 cm deep. Weight 8 kg. 
Power requirements: 220-240 and 110-120 VAC, 45 W.

Two additional nice features: there is an already wired socket where one can plug a OA2 regulator to stabilize the HF and BFO oscillators; and the chassis is pre-punched for crystal and tube sockets if one wants to build a calibrator. Also, I used the spare half of V3 as a cathode follower to feed the HF oscillator to an external frequency counter (useful since the readout is very poor). See here for the schematics. 

Type:HF receiver
Frequency range:A: 0.55 - 1.6 MHz
B: 1.6 - 4.8 MHz
C: 4.8 - 14.5 MHz
D: 10.5 - 30 MHz
Receiver system:Single conversion superheterodyne
IF: 455 KHz
Sensitivity:Band A, B & C: <6 dB (10 dB S/N)
Band D: <18 dB (13 MHz), <10 dB (28 MHz)
Selectivity:10 KHz (-50 dB)
Image rejection:N/A
Voltage:Mains, 110-120 / 220-240 VAC
Power consumption:45 W
Impedance:50 ohms, SO-239
Dimensions (W*H*D):381*178*254 mm
Weight:8.53 Kg
Manufactured:Japan, 1968-1969 (Discontinued)
Other:Bandspread on ham bands. ANL and AVC. Tubes
Related documents:User manual (2 MB)
Schematic (140 KB)

So this is i think the ultimate proof we bought almost every radio which came out on the market. And as people know who followed our auction last year they know my brother and father also bought same equipment so sometimes they decide also to sell and sometimes not.


Look later this week also for our other items.

We ship only by registered priority airmail mosttimes two days to the uk and mainland Europe USA sometimes seven days.

Business seller information

Robert Verlint
Aldo van Eycklaan 60
2343NK Oegstgeest


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  Pay only GBP 15.00 shipping on orders over GBP 500.00 when you buy sigint-aor's other eligible items.
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Item location: Leiden, Netherlands
Shipping to: Worldwide
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Please payment within 24 hours after the auction has ended please !
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