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boiss · 19th May 2023, 11:04 pm

Just Noticed the transformer voltage is also visible on the Transformer cover, See the RH pic.
I used flux meant for surface mounted component soldering, never imagining any probs with it. I put the testmeter probes in the flux and got a couple of Megs resistance. This is no good for high impedance devices. It needed to be cleaned off twice.
The old Veroboard I used was a different pitch and larger spacing compared to the newer stuff which incidentally is also quite bad if you measure between tracks without doing anything with it. OK for low voltage low impedance stuff.
I tried a 1925 BTH horn speaker, it was rather lousy, OK for voice, but music really LoFi.
Tomorrow E415 onto a piece of PCB, Fingers crossed.

19th May 2023, 11:04 pm	#29
boiss Pentode Join Date: Jun 2006 Location: Malaga, Spain. Posts: 235	Re: Philips 2514 Just Noticed the transformer voltage is also visible on the Transformer cover, See the RH pic. I used flux meant for surface mounted component soldering, never imagining any probs with it. I put the testmeter probes in the flux and got a couple of Megs resistance. This is no good for high impedance devices. It needed to be cleaned off twice. The old Veroboard I used was a different pitch and larger spacing compared to the newer stuff which incidentally is also quite bad if you measure between tracks without doing anything with it. OK for low voltage low impedance stuff. I tried a 1925 BTH horn speaker, it was rather lousy, OK for voice, but music really LoFi. Tomorrow E415 onto a piece of PCB, Fingers crossed.