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Post by BBB on Nov 12, 2012 13:02:28 GMT -5
I have a clean SBE Trinidad II base on the way that may need some work and was wondering what mobile the base radio was sourced from...was it the Cortez or was there a Cortez II?
Just thinking I could save a few greenbacks if I sourced the mobile board for a replacement or parts. The add read "hum in speaker" so it may just be a power supply issue that I can quickly discern. Thanks.
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Post by 2600 on Nov 12, 2012 17:13:50 GMT -5
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Sandbagger
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Post by Sandbagger on Nov 12, 2012 19:17:25 GMT -5
I have a clean SBE Trinidad II base on the way that may need some work and was wondering what mobile the base radio was sourced from...was it the Cortez or was there a Cortez II? Just thinking I could save a few greenbacks if I sourced the mobile board for a replacement or parts. The add read "hum in speaker" so it may just be a power supply issue that I can quickly discern. Thanks. Well, the original Trinidad was based on the Catalina II mobile, a bare bones volume, squelch, channel selector radio. Now the Trinidad II is not the same chassis. It is similar to the Cortez (including that annoying hot switched relay which forces you to use a mic wired for relay switching), but there are also enough differences to say that they're not identical. It would appear that SBE kept the model pairing in similar fashion as the T2 seems to be using the Catalina III mobile chassis. |
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Post by BBB on Nov 12, 2012 20:50:37 GMT -5
Thanks for the replies.
I went back and looked at the auction and saw the radio I'm getting is actually the simulated wood surrounded SBE-11CB Trinidad. So that would make it based on the Catalina II mobile. I was off by a few years but it's still good to know.
I've never seen a Trinidad II except on that site. Looks like SBE went from wood T1, to metal T2, back to wood T3.
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Sandbagger
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Post by Sandbagger on Nov 12, 2012 21:40:48 GMT -5
Thanks for the replies. I went back and looked at the auction and saw the radio I'm getting is actually the simulated wood surrounded SBE-11CB Trinidad. So that would make it based on the Catalina II mobile. I was off by a few years but it's still good to know. I've never seen a Trinidad II except on that site. Looks like SBE went from wood T1, to metal T2, back to wood T3. The T1 was also quite a bit larger than the T2. It seemed kind of silly having a radio that size (T1) with all that empty space inside. On the other hand, the empty cabinet gave the speaker fairly good acoustics which resulted in reasonably good fidelity receive audio for a solid state base rig. Another thing you should keep in mind with the Trinidad. There were 2 versions made of that radio. The 'early' version had a single large TO-3 case audio output transistor, and a convoluted mic amp circuit. The 'late' version was a more traditional 2 transistor push-pull audio output. But comparing the T1 and the T2, it would appear that the T2 was a somewhat better design, especially in the receiver. |
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Post by BBB on Nov 20, 2012 19:10:44 GMT -5
Got the Trinidad in yesterday. Very clean case and faceplate. Sure enough the internal power supply was causing hum in the speaker and was making the large transistor near the the back of the main board to get hot. When I checked the voltage it was 18+ volts. Probably had a bit of AC component to it also, haha. The main filter cap in the power supply was bulged at the top so I ran the radio on an external 12 VDC supply and the radio worked!
What I noticed right off the bat is that she's a swinger. 2.5 watts dead key swinging to 8-9 watts PEP. The audio is strong on this one. Checked the AMC pot and it wasn't turned up but 1/3 the way. There is a large ceramic variable capacitor that was turned for max output. I would say someone tuned this one up. Of course that swing was good for the straight 4 pill and I proceeded to shoot some skip with the old gal.
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Sandbagger
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Post by Sandbagger on Nov 20, 2012 22:27:21 GMT -5
Got the Trinidad in yesterday. Very clean case and faceplate. Sure enough the internal power supply was causing hum in the speaker and was making the large transistor near the the back of the main board to get hot. When I checked the voltage it was 18+ volts. Probably had a bit of AC component to it also, haha. The main filter cap in the power supply was bulged at the top so I ran the radio on an external 12 VDC supply and the radio worked! What I noticed right off the bat is that she's a swinger. 2.5 watts dead key swinging to 8-9 watts PEP. The audio is strong on this one. Checked the AMC pot and it wasn't turned up but 1/3 the way. There is a large ceramic variable capacitor that was turned for max output. I would say someone tuned this one up. Of course that swing was good for the straight 4 pill and I proceeded to shoot some skip with the old gal. If you have the large transistor with the heatsink on the back of the main board (as opposed to the power supply section), then you have the older version of the Trinidad. I had (have?) one of those, or at least I did until I stripped the board out of it. I had the idea to drop a 40 channel chassis in there and make a Franken Radio. Someday I might get around to actually doing it. 18V out of the supply suggests that the pass regulator shorted out or one of the other components let go. It shouldn't be a tough job to nail that down. |
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Post by BBB on Nov 21, 2012 8:50:06 GMT -5
Yes there is a large double 2" heat sink sticking up from that sole 2SD180 transistor near the back of the main board. It's not on the schematic or parts list that came in this factory manual.
I'm assuming that the pass regulator is the large 2SD81 transistor mounted to the top of the chassis next to the power supply.
The internal speaker is a Panasonic brand so maybe that also helps with the audio quality. I usually see 'no-name" speakers in CB's.
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Sandbagger
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Post by Sandbagger on Nov 21, 2012 19:01:36 GMT -5
Yes there is a large double 2" heat sink sticking up from that sole 2SD180 transistor near the back of the main board. It's not on the schematic or parts list that came in this factory manual. I'm assuming that the pass regulator is the large 2SD81 transistor mounted to the top of the chassis next to the power supply. The internal speaker is a Panasonic brand so maybe that also helps with the audio quality. I usually see 'no-name" speakers in CB's. If the large audio power transistor is not shown on your schematic or parts list, you probably have the manual for the "newer" design radio. You want this schematic: www.cbtricks.com/radios/sbe/sbe_11cb_trinidad/graphics/sbe_11cb_trinidad_sm_sch_pg_a.pdf |
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