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 Philips Transistor circa 1958
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 Return to top of page · Post #: 16 · Written at 8:36:18 PM on 28 December 2018.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 5841

I noted the set on Radio Museum: There seems to be some misleading stuff there if you try to download. I often wonder if its been hacked? The Malware program here just loves blocking things that pop up there.

You've mentioned that a number of times on here, but I have never had any such issue myself, nor to my knowledge has anyone else reported any such issue. My suggestion is that the problem is at your end with some sort of false positive.


 
 Return to top of page · Post #: 17 · Written at 7:24:48 PM on 30 December 2018.
Marcc's avatar
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 4191

It is odd, as I have actually downloaded a circuit without issue. One has to be careful as my name appears as a contact for a couple of organisations, Which seems to give Carte Blanche to several that need to get a real job, to bombard it. Rare to actually have a week sometimes a day without some grub ringing up, or trying to get into the system.


 
 Return to top of page · Post #: 18 · Written at 10:09:25 AM on 7 January 2019.
Ian Robertson's Gravatar
 Location: Belrose, NSW
 Member since 31 December 2015
 Member #: 1844
 Postcount: 1800

You can replace OC44s and OC45s with silicon BC557s with a performance improvement and for a few cents. Reason is, the circuit had to tolerate huge variations between those early transistors.

Some years back I had a British radio in which the mix/osc and both IFs were dead. OC169, OC170 from memory. BC557s in all positions resulted in a hot performing radio without even needing alignment.


 
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