AM Transmitter Kit
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Location: Sydney, NSW
Member since 28 January 2011
Member #: 823
Postcount: 6687
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^ Actually, thinking back mine might not have been registered but it was carded and I had to collect it from the counter. Perhaps I signed for another item on the same day. (Been spending up on imports while the dollar is favourable. )
Nonetheless, check with your PO as it may have arrived and something's gone awry with the carding.
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Administrator
Location: Naremburn, NSW
Member since 15 November 2005
Member #: 1
Postcount: 7304
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Very good news, all is well.
My kit arrived yesterday and I picked it up from the GPO today. I am a very happy man tonight and will spend some time at work tomorrow putting it together.
The postmaster told me that times for international mail can vary a lot as there are several routes that mail can be carried on.
Well done to Royal Mail and Australia Post for getting our kits to us safely. Well done to the seller too! This kit looks quite professional.
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A valve a day keeps the transistor away...
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Location: Melbourne, VIC
Member since 27 May 2011
Member #: 910
Postcount: 60
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I just got mine too. How did you connect the battery eliminator? I hope it works on 240v? The diagram on the transformers reads 115v each? There only appeared to be one type of unit available. Same supplier as everyone else. The blue and brown wires which I think you connect the mains plug to seems very thin. I will look at putting the transmitter together on the weekend so any suggestions are appreciated.
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Administrator
Location: Naremburn, NSW
Member since 15 November 2005
Member #: 1
Postcount: 7304
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The one I got runs on batteries. 1.5 volt D cell for the A battery and 3 9 volt transistor batteries for the B battery.
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A valve a day keeps the transistor away...
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Location: Sydney, NSW
Member since 28 January 2011
Member #: 823
Postcount: 6687
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I hope it works on 240v? The diagram on the transformers reads 115v each?
I put my kit aside for attention later, and hadn't opened the eliminator. I just had a look at the circuit diagram and it seems that if link 3 (LK3) is in place then the two 115v transformer primaries are wired in series for 230v input. Mine has a link in that position. I've emailed the supplier to get confirmation.
The blue and brown wires which I think you connect the mains plug to seems very thin
Yes, that's the mains cable. The transmitter has a comparatively low power requirement (remember the TX circuit was designed to be run from dry cells) so the battery eliminator it doesn't require a heavy gauge mains cable.
How did you connect the battery eliminator?
Run a pair of wires from the 90v HT+ and HT- terminals (J2) on the eliminator to HT+ and HT- on the TX, and ditto with a pair for the 1.5v LT+ and LT- terminals (J3), taking care to get the polarities right in each case.
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Location: Melbourne, VIC
Member since 27 May 2011
Member #: 910
Postcount: 60
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Thanks GTC. Yes, I received confirmation overnight that the two transformers are wired in series. That is interesting, I had not appreciated that you can wire transformers in series like that. You don't think the unit needs to be earthed?
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Location: Sydney, NSW
Member since 28 January 2011
Member #: 823
Postcount: 6687
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You don't think the unit needs to be earthed?
Short answer: no.
Long answer: the only metal parts exposed are the case screws, and they are screwed into plastic and well away from any part carrying high voltage, so there is nothing to connect a safety earth to.
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