Die Suche ergab 307 Treffer

von ARCHIV
09 Dez 2018, 17:27
Forum: FUNK und RADIO
Thema: Lagerstatik
Antworten: 13
Zugriffe: 23112

Lagerstatik

Guten Morgen zusammen Ich mache hier mal einen neuen Thread auf, wie Martin vorschlug. Das Gewichtsproblem kenne ich. Als wir in das Bauernhaus zogen habe ich meine Funkbude auf dem Dachboden eingerichtet, mit dem Drake TR4 und dem Trio TS500 ging das auch gut. Meine Sammlung R&S, HP, Schomandl...
von ARCHIV
09 Dez 2018, 17:19
Forum: FUNK und RADIO
Thema: Rohde&Schwarz, EK07D Restauration
Antworten: 101
Zugriffe: 103112

Re: Rohde&Schwarz, EK07D Restauration

I cleaned the back panel with the C-connectors and switches, cleaned and lubricated the cooling fan (huge improvement, much more air flow now!) and put fresh grease on the rails of the cleaned enclosure so the receiver chassis would slide in smoothly… anyway, I think I put quite some TLC in the rec...
von ARCHIV
09 Dez 2018, 17:18
Forum: FUNK und RADIO
Thema: Rohde&Schwarz, EK07D Restauration
Antworten: 101
Zugriffe: 103112

Re: Rohde&Schwarz, EK07D Restauration

See attached pictures. You will see the mechanical issue I was facing. In-between the frequency scales on the 'frequency band drum', there are white colored, brass strips. One of those apparently came partly lose and 'hooked' or snagged behind some metal parts of the received close to the drum. The...
von ARCHIV
09 Dez 2018, 17:17
Forum: FUNK und RADIO
Thema: Rohde&Schwarz, EK07D Restauration
Antworten: 101
Zugriffe: 103112

Re: Rohde&Schwarz, EK07D Restauration

Last weekend I was looking at the schematics and sitting stand-by with my old Philips oscilloscope to find out why the receiver LO was not locking/synchronizing. I was suspecting something would not be OK in the 'Steuerteil'. Fault analysis in this receiver is particularly complicated because of th...
von ARCHIV
09 Dez 2018, 17:17
Forum: FUNK und RADIO
Thema: Rohde&Schwarz, EK07D Restauration
Antworten: 101
Zugriffe: 103112

Re: Rohde&Schwarz, EK07D Restauration

I am surprised how accurate the frequency dial actually is! CW and SSB reception works as well with the built in BFO. The tuning capacitor in the oscillator part is made from one massive block of a spezial metal alloy what have extremly low temperatur drifts. (may be this is a OEM part from the Tro...
von ARCHIV
09 Dez 2018, 17:16
Forum: FUNK und RADIO
Thema: Rohde&Schwarz, EK07D Restauration
Antworten: 101
Zugriffe: 103112

Re: Rohde&Schwarz, EK07D Restauration

AZ12 hat geschrieben: That can be a Problem around the 2nd Mixer.
von ARCHIV
09 Dez 2018, 17:16
Forum: FUNK und RADIO
Thema: Rohde&Schwarz, EK07D Restauration
Antworten: 101
Zugriffe: 103112

Re: Rohde&Schwarz, EK07D Restauration

Latest update... the power supply is doing a good job. All voltages are there and very close or at the values in the manual. I put it in my EK07 and the radio came to life! This was really an exciting moment! Dial lights started to light up, tubes started to glow, great glow from the regulator tube...
von ARCHIV
09 Dez 2018, 17:15
Forum: FUNK und RADIO
Thema: Rohde&Schwarz, EK07D Restauration
Antworten: 101
Zugriffe: 103112

Re: Rohde&Schwarz, EK07D Restauration

Wout hat geschrieben: Hi Hans,

Currently, I am using just a random length of wire. About 10m long, hanging outside at about 7 meters above the ground.
To get something that looks like 50 Ohm, I am using a transformer after the wire.

Nothing special really.

Wout
von ARCHIV
09 Dez 2018, 17:15
Forum: FUNK und RADIO
Thema: Rohde&Schwarz, EK07D Restauration
Antworten: 101
Zugriffe: 103112

Re: Rohde&Schwarz, EK07D Restauration

Telesoniek hat geschrieben: Hi Wout,

build like a tank and probably heavy! Wish you happy receptions, what type of antenna do you use?
best
hans
von ARCHIV
09 Dez 2018, 17:14
Forum: FUNK und RADIO
Thema: Rohde&Schwarz, EK07D Restauration
Antworten: 101
Zugriffe: 103112

Re: Rohde&Schwarz, EK07D Restauration

Wout hat geschrieben: Thought it might be nice to upload a picture of the actual receiver as well. I cleaned up the face plate and knobs already.
The inside looks still very neat, apart from some dust here and there it looks pretty much untouched.
IMG_2840.JPG
IMG_2840.JPG (247.43 KiB) 11749 mal betrachtet