{"id":955,"date":"2015-02-15T12:03:42","date_gmt":"2015-02-15T11:03:42","guid":{"rendered":"http:\/\/dc2wk.schwab-intra.net\/?page_id=955"},"modified":"2015-02-15T21:25:27","modified_gmt":"2015-02-15T20:25:27","slug":"tornister-handset-radio-prc-66-german-version","status":"publish","type":"page","link":"https:\/\/dc2wk.schwab-intra.net\/?page_id=955","title":{"rendered":"Repair a PRC-6\/6 (German Version)"},"content":{"rendered":"

I got from eBay a PRC-6\/6 (Banana) Military Squad Radio. It was build in October 1961. The PRC-6 (the U.S. Korea and Vietnam radio) you can get often by eBay, but the german one I saw not so often. So I bought it for 50 \u20ac. The seller wrote, that he can’t test it, so he sell it broken.<\/p>\n

The first what you need is a battery for it. Normally you must have a BA-270\/U. But you can’t buy it any more. So I mus build this by my self.<\/p>\n

This battery specification can be downloaded from the website:
\nhttp:\/\/mil-spec.tpub.com\/MIL-B\/MIL-B-18-75D\/MIL-B-18-75D00001.htm<\/a><\/p>\n

\"IMG_3270\"<\/a><\/p>\n

I made one out of plastic. I heated it and bent it to the dimensions from the\u00a0specification.<\/p>\n

\"IMG_3269\"
\n<\/a>The socket is a 7 pin octal tube socket.
\nThe battery has +90V, +45V, Minus (for 90+45V), -4.5V and +1.5V. See the\u00a0the\u00a0specification. Installed are 10x 9V battery block, 1x 1.5V mono cell and 3x 1.5V mignon cell.\u00a0 I pay for all battery 8 \u20ac by pollin.<\/p>\n

\"IMG_3272\"
\n<\/a>It fits 100% in the Radio.<\/p>\n

\"IMG_3273\"
\n<\/a>After that I can try the first time the radio out, and it was broken. I Checked all tubes (measuring the header) and I saw that 2 tubes are broken. I ordered a near complete set of new tubes (NOS) from a German dealer for 12 \u20ac. After that I solve a contact problem by the channel switch and the radio works \ud83d\ude42<\/p>\n

\"IMG_3274\"
\n<\/a>The crystals are from my craft crate.<\/p>\n

The frequencies are in the moment:<\/p>\n

1: 45.900 MHz
\n2: 49.130 MHz
\n3: 49.180 MHz
\n4. 51.980 MHz
\n5: 53.490 MHz
\n6: 54.900 MHz<\/p>\n

The\u00a0crystals can you calculate with: Frequency – 11.38 MHz =\u00a0crystal frequency.
\nBut I look for\u00a0crystals in the 6m band. From 38.62 MHz to 39.62 MHz.<\/p>\n

\"IMG_3277\"
\n<\/a>After you installed a\u00a0crystal, you must set up the frequency with that scale. You must use the\u00a0four socket head cap screw.<\/p>\n

\"IMG_3275\"
\n<\/a>The original handbook I bought for 16\u20ac brand new and unused.
\n<\/a><\/p>\n

\"IMG_3276\"
\n<\/a>The German caption.<\/p>\n

So my price for a working PRC-6\/6 was app. 90 \u20ac with battery and handbook. Maybe a little bit too expensive,\u00a0but the antique heart that does not matter \ud83d\ude42<\/p>\n