Konzertgerät 4097

Grundig (Radio-Vertrieb, RVF, Radiowerke); Fürth/Bayern

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  • Année
  • 1958/1959
  • Catégorie
  • Radio - ou tuner d'après la guerre 1939-45
  • Radiomuseum.org ID
  • 21687
    • alternative name: Grundig Portugal || Grundig USA / Lextronix

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 Spécifications techniques

  • No. de tubes
  • 7
  • Principe général
  • Super hétérodyne (en général); FI/IF 460 kHz
  • Circuits accordés
  • 6 Circuits MA (AM)     10 Circuits MF (FM)
  • Gammes d'ondes
  • PO, GO, OC et FM
  • Tension / type courant
  • Alimentation Courant Alternatif (CA) / 110; 125; 220 Volt
  • Haut-parleur
  • 3 HP
  • Matière
  • Boitier en bois
  • De Radiomuseum.org
  • Modèle: Konzertgerät 4097 - Grundig Radio-Vertrieb, RVF,
  • Forme
  • Modèle de table avec boutons poussoirs.
  • Dimensions (LHP)
  • 630 x 370 x 250 mm / 24.8 x 14.6 x 9.8 inch
  • Remarques
  • Mit Dynamik-Expander (funktioniert mit Glühlampe, 6V, 0,05 A). Spannungswahl durch Umstecken der Sicherung.
  • Poids net
  • 13.8 kg / 30 lb 6.3 oz (30.396 lb)
  • Prix de mise sur le marché
  • 398.00 DM
  • Source extérieure
  • Erb
  • Littérature
  • -- Original-techn. papers.

 Collections | Musées | Littérature

Collections

Le modèle Konzertgerät fait partie des collections des membres suivants.

 Forum

Contributions du forum pour ce modèle: Grundig Radio-: Konzertgerät 4097

Discussions: 2 | Publications: 2

Experience 4097 restoration

 

  • Overall, beautiful radio. Extensive soundscaping abilities with a cute analog visualization of the soundscape, equalizer-like. 

  • The radio delivers an OK sound experience, nothing dramatic, but it does the job.

  • SW/KW was very selective, to my surprise.

  • FM needed a lot of tuning

  • Experience

    • Almost all capacitors needed replacement; some were sadly deeply hidden and required disassembly to access. Lots of capacitors for the soundscaping, which meant a lot of work, but worth it. You will need to dismantle the soundscaping selector block; several capacitors are hidden behind it.

    • A mechanical selector extension extends the piano selector to the switches further back in the radio. This is a beauty, but in my case, VERY clogged with old grease, and a number of springs had left the building. Clean-up was easy, and for replacing the springs, I cut some from ballpoint pens down to fit. I also used a flexible glue to tie the springs down at both ends to hopefully prevent them from traveling on their own in the future.

    • I also needed to dismantle the volume control block to access all the capacitors. The volume control itself remained a bit shaky in spite of multiple attempts to fix.

    • Resistors all good, no replacements needed

    • There was a 6V bulb used in the amplifier circuit as a power delimitter (?); this needed replacement

    • Indicators of the selected soundscape were tiny 6V bulbs, which were hard to find new ones due to their size. Replaced with blue LED’s & resistor duos, just plugged in as a replacement into the existing sockets. Find ones that can take the raw 6V DC. This was a nice effect.

    • The soundscaping orchestration was visualized as a neat musical bar graph connected by a red line/elastic, which has since disintegrated. I replaced it with red stretch sewing thread and weaved it back and forth a couple of times. There is a red post per pot; I carefully wrapped the thread around them, and I fixed them down with a small drop of super glue.

    • As usual, make extensive notes and pictures, it is easy to get lost in this complicated radio

    • The piano key switches were very dirty and required extensive cleaning. 

    • The case cleaned up nicely.

Pièces jointes

Ben Brand, 20.Apr.26

Weitere Posts (1) zu diesem Thema.

This is one of the most complicated I have undertaken. 
- ALL, yes ALL capacitors are way out of spec
- A large number of the capacitors are built into hard-to-reach places. Major disassembly required.

Make copious notes when disassembling, it is really easy to get confused. 

Reach out if you need help.


 

Ben Brand, 09.Jun.25

Weitere Posts (1) zu diesem Thema.