- Land
- USA
- Hersteller / Marke
- Trav-Ler Karenola Radio & Television Corp.(Travler); Chicago
- Jahr
- 1927
- Kategorie
- Rundfunkempfänger (Radio - oder Tuner nach WW2)
- Radiomuseum.org ID
- 105450
Klicken Sie auf den Schaltplanausschnitt, um diesen kostenlos als Dokument anzufordern.
- Anzahl Röhren
- 5
- Hauptprinzip
- Geradeaus allg. (mit oder ohne Rückk.); 2 NF-Stufe(n)
- Wellenbereiche
- Mittelwelle, keine anderen.
- Betriebsart / Volt
- Trockenbatterien / 2 x 45 & 3 x 1.5 & 4.5 Volt
- Lautsprecher
- Magnetischer Lautsprecher allgemein, System nicht definiert
- Material
- Leder / Stoff / Plastic / Segeltuch über div. Material
- von Radiomuseum.org
- Modell: Portable 5 - Trav-Ler Karenola Radio &
- Form
- Reisegerät > 20 cm (netzunabhängig betreibbar)
- Abmessungen (BHT)
- 12.5 x 10 x 8.5 inch / 318 x 254 x 216 mm
- Originalpreis
- 77.00 $ !
- Literaturnachweis
- The Portable Radio in American Life (p.94)
- Literatur/Schema (1)
- Western Radio Manufacturing Co. 1929 catalogue
- Literatur/Schema (4)
- January 8th 1927, Radio Doings magazine advertisement on page 31
- Autor
- Modellseite von Vitor Oliveira angelegt. Siehe bei "Änderungsvorschlag" für weitere Mitarbeit.
- Weitere Modelle
-
Hier finden Sie 613 Modelle, davon 280 mit Bildern und 513 mit Schaltbildern.
Alle gelisteten Radios usw. von Trav-Ler Karenola Radio & Television Corp.(Travler); Chicago
Forumsbeiträge zum Modell: Trav-Ler Karenola: Portable 5
Threads: 2 | Posts: 2
Fellow Radiophiles:
This post shows the restoration results by Radio Museum guest Michael Lang, who found the information here very helpful to repair his Trav-Ler 5 tube portable radio from the mid 1920's.
One of the problems was the open windings in iron core transformer, which Michael rewound completely. This is not a tuned transformer, so the number of turns is not critical. He was inspired by a post showing the repair of one of these transformers.
Michael also had to improvise a supporting pin for the lid which holds the embedded loop antenna as shown in the next picture. In my slightly earlier version of the radio, I improvised a different pin to hold the loop, which is separate from the lid, as shown the the two pictures on the right.
Date: Tue, 12 Oct 2010 13:48:33 -0400
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Date: Sun, 17 Oct 2010 18:05:10 -0400
Date: Wed, 20 Oct 2010 12:08:07 -0400
![:-)](http://o.aolcdn.com/cdn.webmail.aol.com/resources/core/images/smile.png)
Thank you Michael for sharing your very good photos. We look forward to your joining RMORG.
-Joe
Joe Sousa, 31.Oct.10
Hello Radiophiles,
Ross Hoff has posted a useful method to work around an open untuned RF transformer primary. Ross made his repair on a Crosley 127 Superhet.
As Konrad Birkner points out in his reply to Ross, the ideal approach would be actual replacement of the transformer.
Sometimes, a replacement can't be found.
I had good luck repairing the two open untuned transformers transformers in my Silvertone Trav-ler portable radio.
Part of what made the repair easy is that the exact number of turns is of no importance because the transformers are not tuned. The other aspect that made this repair easy is that the number of turns is not too large.
Often the fault is corrosion right at the coil wire solder connection. I have fixed a few audio and RF transformer just by resoldering the end wires.
The two transformers of the Travler were open and had opens in the middle of the winding that were caused by corrosion. I found the open spots, added a similar ammount of fine wire, and got the transformers working again.
In my case the RF transformers offered a modest amount of step-up gain around 1.3X per transformer.
The transformer load also eliminates plate resistor drop, which reduces plate voltage on a triode and therefor, it's transconductance. This is particularly important if the plate supply is a modest 90V.
click to enlarge photos
The second transformer shown on the right has a wood core, and only need to have the internal wires reconnected. They had corroded open at the point where they exit the transformer.
Regards,
-Joe
Joe Sousa, 13.Oct.09