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7613 on Ebay
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Looks like a good way to get a 7000 series scope so I can again use the amazing? 7A22.? I don't need the storage but gather that one can ignore it.? Is it hard to keep running?? Other thoghts comments? thanks -- Bruce Atwood PhD Department of Astronomy The Ohio State University 100 West 18th Ave., Room 4055 Columbus, OH 43210 Phone 614.314.0189 FAX 614.292.2928 |
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On 12/3/2019 11:08 PM, Bruce Atwood wrote:
I have a 7623A that I would really like to sell. I have two and really don't need more than one. I'm in Michigan. Thanks, ? Bert |
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Bruce-
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If the analog storage capability is not needed by you, consider instead the 7603 model, which has a larger display screen. The 7603 is a very common model, so you should find one easily with a month or so of patience. Another strike against the listing you linked is the 7B80 timebase, which is for a higher speed scope, although it obviously works in the 7613. What you want is the 7B53a. The standard 76xx vertical amp is a 7A18 or 7A26, and the 7A13 with LED display can be very useful, as is the 7A22 you already own. On eBay, the safest scope to buy is a listing that shows a trace on the CRT, and better still showing readout, as the 7603 was available with a "no readout" option. (Option 1)? Also the Option 4 model, with its smaller screen should be avoided. (these are rare). The option tags are inside, near the front of the plug-in compartment as is the serial number tag. "Unit powers up" is meaningless, typically to be interpreted as that the pilot light illuminates when the scope is switched on. Look at pictures for broken knobs. And if you can see that the intensity control is not rotated to anywhere close to fully clockwise for the display of a trace, as this is a clue that the CRT is nearing end of life. Note the the 7603, with no plug-ins, does not show a line of dot on the screen, so a scope may be inaccurately diagnosed as "for parts of not working" by an inexperience seller. Sometimes a gamble pays off. Go Buckeyes!? Trevor On Wednesday, December 4, 2019, 12:34:33 PM EST, Bert Haskins <bhaskins@...> wrote:
On 12/3/2019 11:08 PM, Bruce Atwood wrote: I have a 7623A that I would really like to sell. I have two and really don't need more than one. I'm in Michigan. Thanks, ? Bert |
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Hi Bruce,
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I agree with Trevor. Unless you need storage the 7603 is a better choice for many reasons: * It is the most common mainframe sold so there are lots of them available which means their price will be a lot less than this 7613. * It has the biggest screen which is highly desirable. The 7603 screen is 33% larger than the 7613. * The storage capability requires extra, touchy, internal adjustment to work properly. * You should be able to find a 7603 much closer to home at a ham swap meet, craigslist, etc. where you would have the opportunity to check it before you bought it. * The $113 the seller wants for shipping makes the total price of this 7613 to $290 which is hardly a bargain. By contrast a working 7603 picked up locally will cost you somewhere between $50 and $100. Dennis Tillman W7PF -----Original Message-----
From: Trevor via Groups.Io Sent: Wednesday, December 04, 2019 11:22 AM Subject: Re: [TekScopes] 7613 on Ebay Bruce- If the analog storage capability is not needed by you, consider instead the 7603 model, which has a larger display screen. The 7603 is a very common model, so you should find one easily with a month or so of patience. Another strike against the listing you linked is the 7B80 timebase, which is for a higher speed scope, although it obviously works in the 7613. What you want is the 7B53a. The standard 76xx vertical amp is a 7A18 or 7A26, and the 7A13 with LED display can be very useful, as is the 7A22 you already own. On eBay, the safest scope to buy is a listing that shows a trace on the CRT, and better still showing readout, as the 7603 was available with a "no readout" option. (Option 1) Also the Option 4 model, with its smaller screen should be avoided. (these are rare). The option tags are inside, near the front of the plug-in compartment as is the serial number tag. "Unit powers up" is meaningless, typically to be interpreted as that the pilot light illuminates when the scope is switched on. Look at pictures for broken knobs. And if you can see that the intensity control is not rotated to anywhere close to fully clockwise for the display of a trace, as this is a clue that the CRT is nearing end of life. Note the the 7603, with no plug-ins, does not show a line of dot on the screen, so a scope may be inaccurately diagnosed as "for parts of not working" by an inexperience seller. Sometimes a gamble pays off. Go Buckeyes! Trevor On Wednesday, December 4, 2019, 12:34:33 PM EST, Bert Haskins <bhaskins@...> wrote: I have a 7623A that I would really like to sell. I have two and really don't need more than one. I'm in Michigan. Thanks, Bert On 12/3/2019 11:08 PM, Bruce Atwood wrote:
-- Dennis Tillman W7PF TekScopes Moderator |
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On Tue, Dec 3, 2019 at 9:08 PM Bruce Atwood <atwood.1@...> wrote:
That 7613 seems quite overpriced to me. If all you want is to use a 7A22, and you already have a working scope, forget the 7000 series and buy an AM502 plugin and a TM500 mainframe. It will be cheaper and much easier to maintain. |
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Hi Bert,
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After reading the comments about the 7613 I have to agree that the 7603 is a better deal. Good luck selling your 7623 cheers On 12/4/2019 12:34 PM, Bert Haskins wrote:
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Bruce Atwood PhD Department of Astronomy The Ohio State University 100 West 18th Ave., Room 4055 Columbus, OH 43210 Phone 614.314.0189 FAX 614.292.2928 |
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Thanks to John, Bert Trevor Dennis, David, and John H for your
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informative and insightful comments on the 7613 and the 7603. I've got my fingers crossed for a ham-fest on the 19th. cheers On 12/3/2019 11:08 PM, Bruce Atwood wrote:
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Bruce Atwood PhD Department of Astronomy The Ohio State University 100 West 18th Ave., Room 4055 Columbus, OH 43210 Phone 614.314.0189 FAX 614.292.2928 |
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