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 Post subject: Roland 7TL ( 7TW wood cabinet ) project---sure a neat set !
PostPosted: Sep Thu 27, 2018 5:42 am 
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Joined: Oct Mon 26, 2009 10:02 pm
Posts: 5561
Location: Indianapolis, IN
Hello All,

Had been looking for a leather Roland 7TL portable since receiving & refurbishing another smaller Roland set awhile back which turned out to be an excellent performer. The couple that came up on Ebay sold for more than I wanted to bid and doubted I'd ever find one... Then I saw this wood encased version recently which is first I'd ever seen on Ebay. It looked to be in decent condition, so bid a fairly high amount (for me) at last moment and won it for a reasonable figure...

Got it today and cabinet appears to be in nice shape and should clean up pretty well though the front and rear decals above speakers are worn away in areas. Looked like the grille cloth was loose in Ebay listing and turns out that it is actually perforated, embossed, anodized aluminum ! Radio is quite a bit larger than I thought, also... It worked just as described in listing with "scratchy" volume control. Someone had put a flat-head brass wood screw into phono input jack to engage contact so radio would play. Not the greatest sensitivity as it is and tone is very flat and "trebley"---hope new electrolytics and alignment will bring about big improvement ! Battery-Maker did a video on his awhile back and it's audio sounds similar---did you recap & align yours, Bill ???

Just finished wiring new detached garage tonight and a LOT more work yet to do on it and yard---and now bench covered with radios again ! Whew !!!

Below are a couple quick pics of this radio as received...

Stay tuned !

John


Attachments:
ARF ROLAND 7TL AS RECEIVED 9-26-2018.jpg
ARF ROLAND 7TL AS RECEIVED 9-26-2018.jpg [ 249.17 KiB | Viewed 1161 times ]
ARF ROLAND 7TL AS RECEIVED2 9-26-2018.jpg
ARF ROLAND 7TL AS RECEIVED2 9-26-2018.jpg [ 247.11 KiB | Viewed 1161 times ]


Last edited by xrhonda91 on Sep Fri 28, 2018 4:37 pm, edited 1 time in total.
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 Post subject: Re: Roland 7TL wood-encased portable project---sure a neat s
PostPosted: Sep Thu 27, 2018 2:03 pm 
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Joined: Aug Wed 26, 2009 1:50 am
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Location: Mesquite NV 89027 (from Coventry, UK)
Very neat. I definitely like the wood case.


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 Post subject: Re: Roland 7TL wood-encased portable project---sure a neat s
PostPosted: Sep Thu 27, 2018 2:47 pm 
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Joined: Jan Mon 12, 2009 7:38 am
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Location: homestead, fl
you're lucky i was on a budget... :mrgreen:


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 Post subject: Re: Roland 7TL wood-encased portable project---sure a neat s
PostPosted: Sep Thu 27, 2018 3:00 pm 
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Joined: Jan Tue 31, 2012 1:55 am
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Location: Mountains of Mourne. Ireland.
It's really neat John. Can't wait to see inside.
That's the radio... not the garage. Lol

https://www.radiomuseum.org/r/roland_71_486_ch_7tw.html
https://www.samswebsite.com/en/photofac ... sid/432_10

Greg.


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 Post subject: Re: Roland 7TL wood-encased portable project---sure a neat s
PostPosted: Sep Thu 27, 2018 3:20 pm 
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Joined: Mar Sun 15, 2015 2:02 am
Posts: 94
That a really great looking radio John. Congratulations.

I really like the styling.

It also looks to have a rotatable base similar to the NEC NT-71


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 Post subject: Re: Roland 7TL wood-encased portable project---sure a neat s
PostPosted: Sep Thu 27, 2018 5:03 pm 
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Joined: Jun Sun 22, 2008 2:03 am
Posts: 1338
Location: Burke, VA
This radio retailed for $79.95 in 1959. Compared to its original price, what you paid today is really a bargain.

The actual model is 7TW (W for wood). The 7TL refers to the leather model with identical chassis which was $10 less expensive. The 7TW came in five finish colors: Ebony, Mahogany, Walnut, Blonde and Fruitwood. The leather version debuted in two colors, tan and black; the maroon color was added later.

Curious on how the decals could be restored.

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Binh


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 Post subject: Re: Roland 7TL wood-encased portable project---sure a neat s
PostPosted: Sep Thu 27, 2018 10:53 pm 
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Joined: Oct Mon 26, 2009 10:02 pm
Posts: 5561
Location: Indianapolis, IN
Thanks Guys !

Very grateful to have got it !

Shaun---it does have a rotating base, but wonder if the legs are bent up as the photo in the SAMS makes it look as though it should sit higher...

Binh---where did you find all the info on this set ? I just searched on-line... Would sure like to have a copy for project folder ! Funny thing is that the internal label states model 7TL !

John


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 Post subject: Re: Roland 7TL wood-encased portable project---sure a neat s
PostPosted: Sep Fri 28, 2018 3:44 am 
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Location: Mountains of Mourne. Ireland.
Esquire magazine July 1957
Super power 7-Transistor circuitry with exclusive Omnirange switch for longer range reception!

Greg.


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 Post subject: Re: Roland 7TL wood-encased portable project---sure a neat s
PostPosted: Sep Fri 28, 2018 1:19 pm 
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Location: Burke, VA
Hi John,

Some info for your set was found by searching ads and catalog pages sold on Ebay.

Here is an ad or a catalog page that featured the 7TL and 7TW:
https://i.ebayimg.com/images/g/lO8AAMXQBwlRJ6zr/s-l1600.jpg
https://i.ebayimg.com/images/g/pNkAAOxyvSVREWAI/s-l1600.jpg

A page from the 1958 John Plain catalog that featured the Roland Bi-Fidelity "4" and "7" (4TR and 7TL):
https://i.ebayimg.com/images/g/uH0AAOSw8w1X6aHf/s-l1600.jpg

An ad that appeared on July 28, 1956 in Billboard:
https://books.google.com/books/content?id=fUUEAAAAMBAJ&pg=PA44&img=1&zoom=3&hl=en&sig=ACfU3U0JFEH50qvtfDZOlQqmrKm3tfLacg&w=1347

The ad said that Roland was advertised nationally in Esquire (as Greg found out above) and Sports Illustrated.

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Binh


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 Post subject: Re: Roland 7TL wood-encased portable project---sure a neat s
PostPosted: Sep Fri 28, 2018 4:09 pm 
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Joined: Jan Tue 31, 2012 1:55 am
Posts: 6088
Location: Mountains of Mourne. Ireland.
All transistor 77
Closed listing (description): https://www.ebay.es/itm/232779980169

1600W (remaining) images from above listing...
https://embarrados.com/e-shop/item/2327 ... ransistors

Greg.


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 Post subject: Re: Roland 7TL wood-encased portable project---sure a neat s
PostPosted: Sep Fri 28, 2018 4:31 pm 
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Joined: Oct Mon 26, 2009 10:02 pm
Posts: 5561
Location: Indianapolis, IN
Thanks much, Binh & Greg---images saved to folder !

Greg---neat to know that the 7TL came out in 1957 (thought I'd seen that somewhere before) ! And I had bid on that one from old Ebay listing...

Funny thing is that the "chintzy" "Omni-range" local/distance circuit is in the audio output---see below... Whoop-de-doo...

John


Attachments:
arf roland loc-dist audio boloney.jpg
arf roland loc-dist audio boloney.jpg [ 134.28 KiB | Viewed 1015 times ]
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 Post subject: Re: Roland 7TL ( 7TW wood cabinet ) project---sure a neat se
PostPosted: Sep Fri 28, 2018 5:48 pm 
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Joined: Nov Wed 14, 2007 11:37 pm
Posts: 1497
Quote:
F output---see below... unny thing is that the "chintzy" "Omni-range" local/distance circuit is in the audio Whoop-de-doo...



So where's the rear part of M4 connected to? According to the schematic that's just the front part of the switch.


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 Post subject: Re: Roland 7TL ( 7TW wood cabinet ) project---sure a neat se
PostPosted: Sep Sat 29, 2018 3:13 am 
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Joined: Oct Mon 26, 2009 10:02 pm
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Location: Indianapolis, IN
Hey Metzman---no other portion of switch M4 is shown in schematic !

Hope to have time to take it apart next week...

John


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 Post subject: Re: Roland 7TL ( 7TW wood cabinet ) project---sure a neat se
PostPosted: Oct Sat 06, 2018 4:50 am 
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Joined: Oct Mon 26, 2009 10:02 pm
Posts: 5561
Location: Indianapolis, IN
Man---what a headache !

Took it apart the other day---not fun... Replaced electrolytics today---absolutely no difference in performance. Needed complete alignment as even the tuning dial was way off---performance much better now. But audio has same characteristics---except now much worse on stronger signals. Should sound good with those two 5" speakers ! Same with headphones. Same using signal tracer on IF output---so something is bad in IF chain, but what ??? Not enough time to cover troubleshooting detail, but am at a loss right now on what's going on.

Did a lot of cleaning/detailing, also---ready for parts pics and to go back together once electronics repaired...

More to come as time allows...

John


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 Post subject: Re: Roland 7TL ( 7TW wood cabinet ) project---sure a neat se
PostPosted: Oct Thu 11, 2018 4:56 am 
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Joined: Oct Mon 26, 2009 10:02 pm
Posts: 5561
Location: Indianapolis, IN
Hello All,

Finally completed this set last weekend (except for resolving audio issues) !

Removing chassis no fun---even with instructions printed on label. Tight fit and ferrite rod antenna would not clear edge of cabinet, so removed it with small 1/4" open-end ignition wrench. After removal, noticed spring-steel tabs behind supports which allow antenna to be pushed inward for this process---live and learn !

Applied power with chassis on bench, jumpered electrolytics out of curiousity, and noticed no difference whatsoever in performance and audio quality---same after all were replaced. The original Japanese "Cosmic" caps were fine ! The four RF/IF transistors are socketed and the three audio soldered in place. Added a 9V battery clip for convenience keeping original wiring for "future owner". Radio required complete alignment as even the dial was way off. 1st IFT double-tuned. After alignment, performance much better, but strong local signals distorted. AGC voltage change seemed fine and found no component failures during troubleshooting except that the 1st IF transistor emitter resistor was twice its marked value. Thinking this may be problem, replaced with good part and no change. Replaced mixer & IF transistors, verified alignment, used signal tracer to verify "overload" but could find no cause---maybe design flaw ??? Need to contact Matt about his 7TL... The audio still flat/"trebley"---unbelievable with those two 5" speakers ! And it's not the audio amp circuit---used RF probe of signal tracer at 3rd IFT output and had same poor sound quality ! Tried de-tuning the IF's slightly, but only killed selectivity... Anyone have any ideas of what's going on ??? Ran out of patience and decided to put it back together for now... Watched Matt's 7TL & Bill's 7TW videos on You-Tube and both those sets sounded similar to this one, so am wondering if it's just a poor design ? My smaller Roland not only out-peforms this set noticeably, but sounds much better !

The cabinet cleaned up very well using just slightly damp, then dry cotton cloths and a few hours of careful rubbing. It's solid wood---well made and nicely finished. Used damp then dry Q-tips to remove all the grease residue in handle slots. The few nicks and scratches were taken care of with an old "Markette" brown marker I've had for many years (see pic below)---just applied to area and quickly wiped off excess with fingertips. Have done this with other wood radios and furniture and it works great !

The anodized aluminum trim strip on top was slightly twisted and bent, so carefully straightened it by hand. The thin plastic cover over tuning dial appeared to be made from similar material to what was used in earlier tube sets---cleared up pretty well with Novus-2 polish. Was very careful cleaning inside since ends and top appeared to be simply painted gold. Used water dampened, then dry inside-out cotton socks to clean the anodized aluminum speaker grilles and trim.

The swivel base is attached at center with larger thumbscrew which is also used to adjust "tightness" of rotation.

Inserted handle at end of assembly process to complete---simply slides in and metal tangs lock it into position.

Radio turned out to be a real beauty, but am VERY disappointed in performance and sound quality. Might get into it again one day when motivation returns and time allows... It is a large set---taller and wider than a GE P-780 !

Since it is a unique set, took a lot of pics for those who may be interested---three posts worth...

Would sure like to hear from others who have either this or the 7TL model concerning performance & audio issues !

John


Attachments:
1ARF ROL CHS BK BEFORE.jpg
1ARF ROL CHS BK BEFORE.jpg [ 219.73 KiB | Viewed 883 times ]
2ARF ROL CHS TOP-BK BEFORE.jpg
2ARF ROL CHS TOP-BK BEFORE.jpg [ 167.75 KiB | Viewed 883 times ]
3ARF ROL CHS TOP-FRT BEFORE.jpg
3ARF ROL CHS TOP-FRT BEFORE.jpg [ 184.34 KiB | Viewed 883 times ]
4ARF ROL ORIG PRTS.jpg
4ARF ROL ORIG PRTS.jpg [ 173.32 KiB | Viewed 883 times ]
5ARF ROL PRTS CLN1.jpg
5ARF ROL PRTS CLN1.jpg [ 216 KiB | Viewed 883 times ]
6ARF ROL PRTS CLN2.jpg
6ARF ROL PRTS CLN2.jpg [ 221.79 KiB | Viewed 883 times ]
7ARF ROL CHS CMPLT TOP.jpg
7ARF ROL CHS CMPLT TOP.jpg [ 141.04 KiB | Viewed 883 times ]
8ARF ROL CHS CMPLT TOP-FRT ANG.jpg
8ARF ROL CHS CMPLT TOP-FRT ANG.jpg [ 211.88 KiB | Viewed 883 times ]
9ARF ROL CHS CMPLT BK.jpg
9ARF ROL CHS CMPLT BK.jpg [ 224.56 KiB | Viewed 883 times ]
10ARF ROL CHS CMPLT BOT-BK ANG.jpg
10ARF ROL CHS CMPLT BOT-BK ANG.jpg [ 221.37 KiB | Viewed 883 times ]


Last edited by xrhonda91 on Oct Thu 11, 2018 5:47 am, edited 2 times in total.
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 Post subject: Re: Roland 7TL ( 7TW wood cabinet ) project---sure a neat se
PostPosted: Oct Thu 11, 2018 4:59 am 
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Joined: Oct Mon 26, 2009 10:02 pm
Posts: 5561
Location: Indianapolis, IN
Here is the 2nd of three installments...


Attachments:
11ARF ROL BAT COMPARTMENT CLN BOT.jpg
11ARF ROL BAT COMPARTMENT CLN BOT.jpg [ 120.94 KiB | Viewed 883 times ]
12ARF ROL BAT COMPARTMENT CLN TOP.jpg
12ARF ROL BAT COMPARTMENT CLN TOP.jpg [ 116.03 KiB | Viewed 883 times ]
13ARF ROL BASE SECTION CLN BOT.jpg
13ARF ROL BASE SECTION CLN BOT.jpg [ 111.47 KiB | Viewed 883 times ]
14ARF ROL SWIVEL BASE ASSMBLD.jpg
14ARF ROL SWIVEL BASE ASSMBLD.jpg [ 152.22 KiB | Viewed 883 times ]
15ARF ROL FINISH TOUCH-UP MARKER.jpg
15ARF ROL FINISH TOUCH-UP MARKER.jpg [ 113.05 KiB | Viewed 883 times ]
17ROL CAB CLN INS1.jpg
17ROL CAB CLN INS1.jpg [ 129.15 KiB | Viewed 883 times ]
18ROL CAB CLN INS2.jpg
18ROL CAB CLN INS2.jpg [ 179.47 KiB | Viewed 883 times ]
19ROL CAB CLN INS3.jpg
19ROL CAB CLN INS3.jpg [ 152.03 KiB | Viewed 883 times ]
20ARF ROL CAB CLN.jpg
20ARF ROL CAB CLN.jpg [ 215.68 KiB | Viewed 883 times ]
21ARF ROL ASSY1.jpg
21ARF ROL ASSY1.jpg [ 139.26 KiB | Viewed 883 times ]
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 Post subject: Re: Roland 7TL ( 7TW wood cabinet ) project---sure a neat se
PostPosted: Oct Thu 11, 2018 5:03 am 
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Joined: Oct Mon 26, 2009 10:02 pm
Posts: 5561
Location: Indianapolis, IN
Here is the 3rd and final installment of pics---please see previous posts for first two...


Attachments:
22ARF ROL ASSY2.jpg
22ARF ROL ASSY2.jpg [ 217.13 KiB | Viewed 883 times ]
23ARF ROL ASSY3.jpg
23ARF ROL ASSY3.jpg [ 215.98 KiB | Viewed 883 times ]
24ARF ROL ASSY4.jpg
24ARF ROL ASSY4.jpg [ 188.95 KiB | Viewed 883 times ]
25ARF ROL ASSY5.jpg
25ARF ROL ASSY5.jpg [ 158.62 KiB | Viewed 883 times ]
26ARF ROL CMPLT FRT FRT.jpg
26ARF ROL CMPLT FRT FRT.jpg [ 230.97 KiB | Viewed 883 times ]
27ARF ROL CMPLT FRT LFT.jpg
27ARF ROL CMPLT FRT LFT.jpg [ 202.77 KiB | Viewed 883 times ]
28ARF ROL CMPLT FRT RT.jpg
28ARF ROL CMPLT FRT RT.jpg [ 221.38 KiB | Viewed 883 times ]
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 Post subject: Re: Roland 7TL ( 7TW wood cabinet ) project---sure a neat se
PostPosted: Oct Thu 11, 2018 4:38 pm 
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Location: Mesquite NV 89027 (from Coventry, UK)
Beautiful!


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 Post subject: Re: Roland 7TL ( 7TW wood cabinet ) project---sure a neat se
PostPosted: Oct Thu 11, 2018 9:07 pm 
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Joined: Jan Tue 23, 2018 11:53 pm
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Location: Appleton, WI 54914
OUTSTANDING work!


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 Post subject: Re: Roland 7TL ( 7TW wood cabinet ) project---sure a neat se
PostPosted: Oct Fri 12, 2018 3:51 am 
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Joined: Oct Mon 26, 2009 10:02 pm
Posts: 5561
Location: Indianapolis, IN
Thanks very much, Guys !

Sure wish it worked/sounded good enough to enjoy---maybe get the scope on it this winter...

John


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