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AARGHH, Isn't it typical.
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Tomas
Hi group.
Got my 7854 yeasterday, and guess what the f...g transportation company did. The back of the scope is smashed, with the sheet of metal with the Fan output and the connectors completly pressed to the main chassis. It will need quite a lot of force to bend this. Now, what is broken, well the metal partsa can be re-bent back to proper shape. I cant see any damage to the electronics. The scope starts up, and I finally managed to get a trace (need to read the OM thoroughly, it is a complicated beast, as it seems.) BUT the fan-blades are completly crushed, so either I need to get hold of new fanblades, or, do some surgery and replace the existing fan with a computertype of fan. That however will force me to create some sort of new fan-speed/temperature controller. Thinking of using a controller designed for computers. Is this doable, and how large needs the fan to be (cfm or m3/h). I vagely remember seeing something about this somewhere on the net. With best regards Tomas Larsson TL Engineering & Consultants Engelbrektsgatan 121 SE 506 39 Bor?s Sweden +46 739 932 673 Verus Amicus Est Tamquam Alter Idem -----BEGIN PGP PUBLIC KEY BLOCK----- Version: GnuPG v1.4.7 (MingW32) mQGiBEhFpFgRBADVkG89wwwJOYAoMjRsgyhcm5W3winq7oVew4skWbZD5AUlfDdw iAaoM8pIXChnXWw38skNBh7NdMP73JyemoIrcCfa9qQg45FGTxo/Is97iD67s4nQ VEmjpuqpTT86hiymLWrLZ4mxDi7rjyYpEzMaV22WVkGUe+CHGuS3qgL5/wCg6Ru3 Y0Pnlp4rQVSRg180w2QwHEUEAK146rdM9d5cILPlo44vSlyuFAIv6rWeF6aC0U1h lt4AF8hWeYghXzcN5mgJgEtT5ll5FdqVwgmKTMfmVuo76Q3Rwk37NvizPmS3jSDe bsnS0KltYqZ4CZ8KKtHqOZYGmiVgxVkI3WtMqaKUju6va60aRcehN2fT2L5qXaE3 pOWxA/4gLT3tjxf7HmSCtb1+G4FTpRQ9zWxkmDV0qC4RhzcHlj9F14o7SpXMndnJ F0oCplnjhW4bMGOvMZFGw//v36dCz2vSE4KE7oj7rhCqFun8rklRdwNYFDW2yIHy FHzM6SvlLBB8DhXOIEq2PXnGy8YnOCFf1gQu1JChB2EroXQGxbQjVG9tYXMgTGFy c3NvbiBIZW1tYSA8dG9tYXNAdGxlYy5zZT6IYAQTEQIAIAUCSEWkWAIbIwYLCQgH AwIEFQIIAwQWAgMBAh4BAheAAAoJEM8L+xprH7d5qJsAn2dUdOzU5fAOF0oUpBp9 ytNJXkVcAKDhXRQkciHSJEop87WodUN3fM2OjbkBDQRIRaRYEAQAo/lRwYLEupsl h86TW1oWM4XFuh/LjIus7tBZBMRuEeiv71HIsK2yJKPu+dc09tSNshX9gmPN1bXN jhPZwO8PgbeAqgnerOKgysMQofsmywoEXmCDIsTDxw1JfGj4dy1gR9wDStzcMPAG 8Gy4kntctEMCrMgDSM9jp1ZWPYvGA4MAAwYD/2W/h4zNbVWb/X9560wR/hNimPml qi6jSC/TiSG8KIuE5Vw8IdgX3vNNvEF7bTxcRokngIb9+FlMIebaM23CMEkbZB53 XwKvy9OqldjMDKKBVzD5IznqiS3uOkQI8UyGzzLY2FHL/azRtpTYy0hlGW7Lqa2+ XbBgQi9BN2UPhF8HiEkEGBECAAkFAkhFpFgCGwwACgkQzwv7Gmsft3mj3QCgwYZD FJc9zt88euTsWwnjz0jowVoAn0+nWG4RE84G2zyP1d2WLP4z7HRp =mM3w -----END PGP PUBLIC KEY BLOCK----- |
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Dave Casey
As I recall from reading up on this, the fan is not temperature controlled but a burshless DC design running at a constant RPM. I could be mistaken, but I don't remember anything in the manual discussing temperature control.
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I think Walter at Sphere might have one, but shipping to the EU might be pricey. I was fortunate in that while my 7854 had been dropped, I knew this ahead of time and after reforming the rear panel, the fan works properly. Dave Casey ----- Original Message -----
From: Tomas To: TekScopes@... Sent: Tuesday, September 16, 2008 2:00 PM Subject: [TekScopes] AARGHH, Isn't it typical. Hi group. Got my 7854 yeasterday, and guess what the f...g transportation company did. The back of the scope is smashed, with the sheet of metal with the Fan output and the connectors completly pressed to the main chassis. It will need quite a lot of force to bend this. Now, what is broken, well the metal partsa can be re-bent back to proper shape. I cant see any damage to the electronics. The scope starts up, and I finally managed to get a trace (need to read the OM thoroughly, it is a complicated beast, as it seems.) BUT the fan-blades are completly crushed, so either I need to get hold of new fanblades, or, do some surgery and replace the existing fan with a computertype of fan. That however will force me to create some sort of new fan-speed/temperature controller. Thinking of using a controller designed for computers. Is this doable, and how large needs the fan to be (cfm or m3/h). I vagely remember seeing something about this somewhere on the net. With best regards Tomas Larsson TL Engineering & Consultants Engelbrektsgatan 121 SE 506 39 Bor?s Sweden +46 739 932 673 Verus Amicus Est Tamquam Alter Idem -----BEGIN PGP PUBLIC KEY BLOCK----- Version: GnuPG v1.4.7 (MingW32) mQGiBEhFpFgRBADVkG89wwwJOYAoMjRsgyhcm5W3winq7oVew4skWbZD5AUlfDdw iAaoM8pIXChnXWw38skNBh7NdMP73JyemoIrcCfa9qQg45FGTxo/Is97iD67s4nQ VEmjpuqpTT86hiymLWrLZ4mxDi7rjyYpEzMaV22WVkGUe+CHGuS3qgL5/wCg6Ru3 Y0Pnlp4rQVSRg180w2QwHEUEAK146rdM9d5cILPlo44vSlyuFAIv6rWeF6aC0U1h lt4AF8hWeYghXzcN5mgJgEtT5ll5FdqVwgmKTMfmVuo76Q3Rwk37NvizPmS3jSDe bsnS0KltYqZ4CZ8KKtHqOZYGmiVgxVkI3WtMqaKUju6va60aRcehN2fT2L5qXaE3 pOWxA/4gLT3tjxf7HmSCtb1+G4FTpRQ9zWxkmDV0qC4RhzcHlj9F14o7SpXMndnJ F0oCplnjhW4bMGOvMZFGw//v36dCz2vSE4KE7oj7rhCqFun8rklRdwNYFDW2yIHy FHzM6SvlLBB8DhXOIEq2PXnGy8YnOCFf1gQu1JChB2EroXQGxbQjVG9tYXMgTGFy c3NvbiBIZW1tYSA8dG9tYXNAdGxlYy5zZT6IYAQTEQIAIAUCSEWkWAIbIwYLCQgH AwIEFQIIAwQWAgMBAh4BAheAAAoJEM8L+xprH7d5qJsAn2dUdOzU5fAOF0oUpBp9 ytNJXkVcAKDhXRQkciHSJEop87WodUN3fM2OjbkBDQRIRaRYEAQAo/lRwYLEupsl h86TW1oWM4XFuh/LjIus7tBZBMRuEeiv71HIsK2yJKPu+dc09tSNshX9gmPN1bXN jhPZwO8PgbeAqgnerOKgysMQofsmywoEXmCDIsTDxw1JfGj4dy1gR9wDStzcMPAG 8Gy4kntctEMCrMgDSM9jp1ZWPYvGA4MAAwYD/2W/h4zNbVWb/X9560wR/hNimPml qi6jSC/TiSG8KIuE5Vw8IdgX3vNNvEF7bTxcRokngIb9+FlMIebaM23CMEkbZB53 XwKvy9OqldjMDKKBVzD5IznqiS3uOkQI8UyGzzLY2FHL/azRtpTYy0hlGW7Lqa2+ XbBgQi9BN2UPhF8HiEkEGBECAAkFAkhFpFgCGwwACgkQzwv7Gmsft3mj3QCgwYZD FJc9zt88euTsWwnjz0jowVoAn0+nWG4RE84G2zyP1d2WLP4z7HRp =mM3w -----END PGP PUBLIC KEY BLOCK----- |
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