Right, finally got some play time now the infernal bastards have fucked off
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Well full checkout, FM and AM modulation works fine. All ranges work fine. Attenuator seems ok although I haven't done any scientific tests yet. ALC is however good. The oscillators drift around a bit but this appears to have settled down after about 30 minutes powered up.
Don't turn it on, take it apart. Bum shot. Quite a complicated beast. All caps were good and the mains filter is not a mains filter - it's just an IEC socket. That saved a few quid. The entire device takes ~10W. Lots and lots of top quality parts in here:
![](https://i.imgur.com/vhaqlOK.jpg)
RF "cabin" is separate at the top. Proper chunk of cast metal with RF seals around it and all exiting signals via hard line to the attenuator. All low frequency signals on pass-through caps. ALC /modulation board:
![](https://i.imgur.com/KrDydqm.jpg)
Main oscillators are a bunch of varactor controlled oscillators on a sub-board which hinges out. These are switched in by the front panel switch via some bog standard 1n5711's.
![](https://i.imgur.com/1yr5rnj.jpg)
Outside:
![](https://i.imgur.com/xkbrtxg.jpg)
Quick board detail - nice quality:
![](https://i.imgur.com/gX1kl0y.jpg)
To note the dial calibration is total balls. It's useless. So far out it's unreal. I'm not sure if I'll have to re-string it or anything yet but the basic controls and a counter rammed in the counter port on the back are probably better.
Very happy.
@Specmaster asked a question: would I recommend this for broadcast radios. The answer is a resounding NO because it only covers 10-520MHz. I want this to test filters in the 130-180MHz range. The TF2016 is what you want for that - 10KHz to 120MHz.
This does have a sweep input which 0-18V (from my soon to arrive 3310A) can sweep it across a full range. That will result in filter sweeps on a scope with my W7ZOI power meter
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