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 Post subject: Heathkit Line
PostPosted: Jun Tue 13, 2017 8:14 am 
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Joined: Nov Wed 15, 2006 7:56 am
Posts: 1335
Location: germany
I got a loadet car of gear including a heathkit line, RX, TX, scope + speaker.
What you think please about the idea to do a complete restoration of this very glowing apparatus?
The oldies are complete with manuals.

greetings
Martin


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 Post subject: Re: Heathkit Line
PostPosted: Jun Tue 13, 2017 12:33 pm 
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Joined: Oct Tue 11, 2016 4:41 am
Posts: 144
Location: Virginia USA
Martin,

Congratulations on landing the Heathkit station. Any photos? Posting model numbers & photos will help the experienced Heathkit restorers in this forum provide you with useful answers.

Good luck!

Brad


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 Post subject: Re: Heathkit Line
PostPosted: Jun Tue 13, 2017 3:27 pm 
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Joined: Nov Wed 15, 2006 7:56 am
Posts: 1335
Location: germany
hello Brad, thank you much for help :wink:

Attachment:
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heathkit-1.jpg [ 174.71 KiB | Viewed 3991 times ]


Attachment:
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heathkit-2.jpg [ 245.66 KiB | Viewed 3991 times ]


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heathkit-4.jpg [ 158.87 KiB | Viewed 3991 times ]


the Heathkit Line :wink: (313, 600, 610, 401)

greetings
Martin


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 Post subject: Re: Heathkit Line
PostPosted: Jun Tue 13, 2017 4:43 pm 
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Posts: 6512
Martin,

I think the SB series line is well worth restoring. It was designed and sold while business was still going very well for the company.

The tuning capacitor wipers in the LMO (linear master oscillator as Heathkit called their VFO in the SB series) will likely need cleaning in both the receiver and the transmitter. The SB-303 uses plug-in boards and I would remove those and re-seat them a couple of times to clean any corrosion from the connectors. The SB-610 monitor scope will have some high voltage capacitors that should be replaced to protect the somewhat fragile power transformer. There is nothing really difficult about restoring these pieces as long as the original builder did a decent job.

Heathkit featured the SB-303/SB-401 station with all of its matching accessories in a double page spread in one of their catalogs and that is one of the station setups I was determined to recreate when I started collecting vintage gear.

Good luck with your Heathkit station and there are several users here who can likely answer any questions you have with restoration and operation.

Rodger WQ9E


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 Post subject: Re: Heathkit Line
PostPosted: Jun Tue 13, 2017 6:19 pm 
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Joined: Sep Sat 06, 2008 3:04 am
Posts: 211
Location: Benton City, WA
rsingl wrote:

Heathkit featured the SB-303/SB-401 station with all of its matching accessories in a double page spread in one of their catalogs and that is one of the station setups

Rodger, Martin's picture shows a SB313 (or so it says). I was not even familiar with that model since the SB303 was so common.
Jim


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 Post subject: Re: Heathkit Line
PostPosted: Jun Tue 13, 2017 6:51 pm 
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Southerner wrote:
Rodger, Martin's picture shows a SB313 (or so it says). I was not even familiar with that model since the SB303 was so common.
Jim


Jim,
And I should have caught that because I just installed a CW filter in my SB-313 two weeks ago. Since Martin got his with the SB-401 it will be interesting whether 15 meters has been installed in place of one of the SWBC bands to add to the 80,40, and 20 meter coverage that is stock in this SWBC oriented model.

Rodger WQ9E


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 Post subject: Re: Heathkit Line
PostPosted: Jun Tue 13, 2017 10:05 pm 
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Joined: May Sat 12, 2012 1:33 pm
Posts: 1687
Location: Rochester, NY.
I have the SB-101 with matching speaker and power supply.
It had sat for awhile, so general control/tube socket cleaning was in order. I found the Heathkit service bulletins for known issues and upgrades really helped to bring this xceiver up to snuff:
https://www.nostalgickitscentral.com/he ... thkit.html


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 Post subject: Re: Heathkit Line
PostPosted: Jun Tue 13, 2017 10:56 pm 
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Joined: Nov Sun 15, 2015 8:32 pm
Posts: 118
Location: Poteau, OK
Southerner wrote:
rsingl wrote:

Heathkit featured the SB-303/SB-401 station with all of its matching accessories in a double page spread in one of their catalogs and that is one of the station setups

Rodger, Martin's picture shows a SB313 (or so it says). I was not even familiar with that model since the SB303 was so common.
Jim



The SB-313 solid state receiver is the "Short Wave" version of the solid state SB-303 Ham Band only receiver.

The SB-303 and SB-313 are the sold state equivalents to the vacuum tube SB-300/301 and SB-310.

I have an SB-303 with the SSB and CW filters. It's a nice receiver except it did not have nor was there ever a noise limiter option. To overcome that, I installed
a Kenwood TS-520 (X54-1080-10) Noise Blanker board. I modified the SB-303's front panel RF gain control Pull/Push headphone/speaker switch switch wiring
so the Push/Pull switch controlled (turns blanker ON/OFF) the Noise Blanker. I replaced the rear panel 1/4" mono non-switch headphone socket with a 1/4" mono
switch headphone socket. Headphones inserted into the 1/4" socket the speaker is disable, removing the headphones from socket enables the speaker.

The Kenwood Noise Blanker acts on pulsing type noise such as power line arcing, hair dryer, ignition and other types of pulse type noises. The noise blanker
does not have any act on lightning static crashes or other non-pulse type noise.

I have a video on my website that shows the SB-303 in operation and arcing noise clearly heard in the speaker with the Noise Blanker turned OFF but noise is
reduced/eliminated by turning the Noise Blanker ON.

http://w5rkl.com/wp-content/uploads/201 ... SB-303.avi

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Mike W5RKL
https://www.w5rkl.com


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 Post subject: Re: Heathkit Line
PostPosted: Jun Tue 13, 2017 11:56 pm 
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Mike,

Nice adaptation of the Kenwood board to provide a NB for the SB-303/313! It was surprising that Heathkit didn't include any sort of blanker option for the SB-303/313 receivers. There was an article, in QST if I recall correctly, showing how to use the SB-104 noise blanker in the SB-303. Another QST article described a solid state transmitter to pair with the SB-303.

Kenwood used the same 3.395 Mhz. second IF as Heathkit in several of their rigs including the excellent R-599A/R-599D receivers. Although not as high performance as the Drake 4 line twins, the Kenwood 599 twins are an excellent vintage SS pair with a well designed transmitter and receiver and deserve a close look from anyone interested in a compact pair of vintage twins. A parts 599 receiver would provide a workable AM filter for the now hard to find Heathkit AM filter; they aren't the same physical size but I tried one in my SB-310 while looking for a Heathkit filter and it works well. Kenwood made everything standard (except for the internal 6 and 2 meter converters) in their 599 receivers so all 4 filters (including FM), the noise blanker, and calibrator were all stock unlike many of their competitors. But if you are buying a set of 599 twins make sure that the connecting control cable is included because it has an uncommon connector that was used on the twins, some higher end JA video gear, and not much else so it is difficult to find.

Rodger WQ9E


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 Post subject: Re: Heathkit Line
PostPosted: Jun Wed 14, 2017 12:10 am 
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Joined: Nov Sun 15, 2015 8:32 pm
Posts: 118
Location: Poteau, OK
rsingl wrote:
Mike,

Nice adaptation of the Kenwood board to provide a NB for the SB-303/313! It was surprising that Heathkit didn't include any sort of blanker option for the SB-303/313 receivers. There was an article, in QST if I recall correctly, showing how to use the SB-104 noise blanker in the SB-303. Another QST article described a solid state transmitter to pair with the SB-303.

Kenwood used the same 3.395 Mhz. second IF as Heathkit in several of their rigs including the excellent R-599A/R-599D receivers. Although not as high performance as the Drake 4 line twins, the Kenwood 599 twins are an excellent vintage SS pair with a well designed transmitter and receiver and deserve a close look from anyone interested in a compact pair of vintage twins. A parts 599 receiver would provide a workable AM filter for the now hard to find Heathkit AM filter; they aren't the same physical size but I tried one in my SB-310 while looking for a Heathkit filter and it works well. Kenwood made everything standard (except for the internal 6 and 2 meter converters) in their 599 receivers so all 4 filters (including FM), the noise blanker, and calibrator were all stock unlike many of their competitors. But if you are buying a set of 599 twins make sure that the connecting control cable is included because it has an uncommon connector that was used on the twins, some higher end JA video gear, and not much else so it is difficult to find.

Rodger WQ9E


The reason I used the Kenwood Noise Blanker board is, the board operates from "+15VDC" which is readily available in the SB-303 Function switch "Orange" wire.
The SB-104 required voltage dividers which was something I didn't care to mess with.

My SB-303 does not have the AM filter but Heathkit AM filter maximum bandwidth was 3.7Khz, just barely covering one plate modulated AM side band. It would work fine
for Controlled Carrier Screen Modulated AM which quite often only transmits AM on one side band. Drake uses that method of AM. Heathkit also did the same method in their
1960s Marauder HX-10, LSB AM only.

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73
Mike W5RKL
https://www.w5rkl.com


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 Post subject: Re: Heathkit Line
PostPosted: Jun Wed 14, 2017 11:44 am 
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Joined: Nov Wed 15, 2006 7:56 am
Posts: 1335
Location: germany
w5rkl wrote:
To overcome that, I installed
a Kenwood TS-520 (X54-1080-10) Noise Blanker board. I modified the SB-303's front panel RF gain control Pull/Push headphone/speaker switch switch


beside this heathkit line there is also the TS520 :D It will also go in restoration... and a FT101, some antenna tuners, meters, all manuals.. I will have a lot of work in the comming time.

the start is done... I have restorated the little test gear line what is a IM38 rms meter beside the "signal tracer" beside the IM18 VTVM. They are cute and full working. Today I have to wash complete the heathkit Power supply (providing some heating voltage and up to 400V, inside is a pair 6L6). There are more heathkit units, restoration one by one. Also a small heathkit Hamradio solid state with BFO, an apparatus for learning CW with little speaker, a smaller green speaker and some other..

greetings
Martin


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 Post subject: Re: Heathkit Line
PostPosted: Jun Thu 15, 2017 1:09 am 
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Joined: Jul Sat 23, 2011 9:33 pm
Posts: 919
Location: Long Beach Ms. USA 39560
There should not be 6L6 tubes inside a heathkit power supply.
I hope I misread your post or somebody built something inside the power supply case.
There is a modification on the internet to the monitor scope to prevent the CRT from burning if you do not feed it receiver audio when you are not transmitting.
good luck,
Pat

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Pat W5THT
Unhappy tubes blush while unhappy power FETs scatter plastic


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 Post subject: Re: Heathkit Line
PostPosted: Jun Thu 15, 2017 1:16 am 
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Joined: Nov Wed 15, 2006 7:56 am
Posts: 1335
Location: germany
hello Pat,

Heathkit IP2717

If you like I can make some pictures. This PSU is also waiting for washing + restoration, arrived last sunday
(full working, but very dusty! )

greetings
Martin


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 Post subject: Re: Heathkit Line
PostPosted: Jun Thu 15, 2017 2:52 am 
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The 6L6 (and some of its variants) were used as high power regulator tubes in several of the Heathkit variable voltage power supplies.

Martin, you found a nice grouping of vintage gear.

Rodger WQ9E


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 Post subject: Re: Heathkit Line
PostPosted: Jun Thu 15, 2017 1:32 pm 
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Joined: Nov Sun 15, 2015 8:32 pm
Posts: 118
Location: Poteau, OK
MM wrote:
........I have to wash complete the heathkit Power supply (providing some heating voltage and up to 400V, inside is a pair 6L6)........

greetings
Martin


Martin and others,

I recall there were 2 Heathkit high voltage power supplies that had 6L6s as regulators

The Heathkit PS-4
https://www.flickr.com/photos/duganj/4987434231

The Heathkit IP-17
http://wd4eui.com/Heathkit_IP_17_HV_Supply.html

The older 1955 Heathkit PS-3 (left top shelf) used 1619 Beam Power Pentodes as regulators
http://w5rkl.com/wp-content/uploads/2017/05/Various-Heathkit-DC-power-supplies.jpg

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Mike W5RKL
https://www.w5rkl.com


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 Post subject: Re: Heathkit Line
PostPosted: Jun Thu 15, 2017 1:34 pm 
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Joined: Nov Wed 15, 2006 7:56 am
Posts: 1335
Location: germany
hello,

this is the IP2717.
Attachment:
ip2717-1.jpg
ip2717-1.jpg [ 172.32 KiB | Viewed 3746 times ]


Attachment:
ip2717-2.jpg
ip2717-2.jpg [ 184.33 KiB | Viewed 3746 times ]


Attachment:
ip2717-4.jpg
ip2717-4.jpg [ 199.09 KiB | Viewed 3746 times ]


there are 2x 6L6. It looks very close to the 17.
greetings
Martin


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 Post subject: Re: Heathkit Line
PostPosted: Jun Thu 15, 2017 8:38 pm 
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Joined: Nov Sun 15, 2015 8:32 pm
Posts: 118
Location: Poteau, OK
Martin,

The picture of your power supply is a "Heathkit SP-2717A".

The SP-2717A is basically the same supply as the IP-17 except for the following circuit and cabinet changes

SP-2717A:
1. V1 and V2 (OA2 regulator tubes) were replaced with 10 zener diodes, 5 zener diodes for each tube
2. V4 (6X4 rectifier tube) was replaced with silicon diodes.
3. The cabinet color was changed from Brown to Blue

The SP-2717A model number is found at the bottom of the front panel below the center BLACK negative Banana socket.

Assuming there are no problems with your SP-2717A but you find no B+ on the RED banana socket, check the DC ON/STANDBY toggle switch,
it must be in the DC ON position for B+ to be present on the RED B+ banana socket.

The front panel VOLT METER "rocker" switch must be set properly for B+ or C- bias voltage to be displayed on the VOLT meter. The CURRENT
meter does not have a switch, the meter is in the B+ circuit regardless whether B+ or C- supplies are selected.

I have partial manuals for the IP-17 and SP-2717A, both have the schematics

IP-17
http://w5rkl.com/wp-content/uploads/201 ... manual.pdf

SP-2717A
http://w5rkl.com/wp-content/uploads/2015/02/SP2717A.pdf

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73
Mike W5RKL
https://www.w5rkl.com


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 Post subject: Re: Heathkit Line
PostPosted: Jun Fri 16, 2017 12:43 am 
Member

Joined: Nov Wed 15, 2006 7:56 am
Posts: 1335
Location: germany
w5rkl wrote:
Martin,

The picture of your power supply is a "Heathkit SP-2717A".

The SP-2717A is basically the same supply as the IP-17 except for the following circuit and cabinet changes

SP-2717A:
1. V1 and V2 (OA2 regulator tubes) were replaced with 10 zener diodes, 5 zener diodes for each tube
2. V4 (6X4 rectifier tube) was replaced with silicon diodes.
3. The cabinet color was changed from Brown to Blue


hello Mike,
you see on my picture there are the 2 pcs. OA2 and also the 6X4.
but the cabinet is blue. :wink: This unit was sold by Heathkit germany in september of 1977, for 378,- DM (the shopping paper is still there)
May be they have it collected from the rest of production, 1977 was too late for a tubes unit.

greetings
Martin


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 Post subject: Re: Heathkit Line
PostPosted: Jun Fri 16, 2017 3:15 pm 
Member

Joined: Nov Sun 15, 2015 8:32 pm
Posts: 118
Location: Poteau, OK
MM wrote:
w5rkl wrote:
Martin,

The picture of your power supply is a "Heathkit SP-2717A".

The SP-2717A is basically the same supply as the IP-17 except for the following circuit and cabinet changes

SP-2717A:
1. V1 and V2 (OA2 regulator tubes) were replaced with 10 zener diodes, 5 zener diodes for each tube
2. V4 (6X4 rectifier tube) was replaced with silicon diodes.
3. The cabinet color was changed from Brown to Blue


hello Mike,
you see on my picture there are the 2 pcs. OA2 and also the 6X4.
but the cabinet is blue. :wink: This unit was sold by Heathkit germany in september of 1977, for 378,- DM (the shopping paper is still there)
May be they have it collected from the rest of production, 1977 was too late for a tubes unit.

greetings
Martin


Yes Martin, I see your supply has the OA2 regulator and 6X4 rectifier tubes.

The following link shows a picture (far right) of what the owner refers to as an "IP-2717" which is the "kit" version of the 0-400VDC supply.
.
http://www.rockford-industrial.com/Agricultural-/Machesney-Park-/Heathkit-model-ip-2717A-high-voltage-power-supply-mint.HTML

The 1983 Spring/Summer Heathkit catalog, page 67,

http://heathkitcatalogs.com/index.php/c ... r-1983-302

shows the IP-2717A/SP-2717A as the "improved Low Cost Heathkit 0-400VDC Power Supply". The supply came in 2 versions

IP-2717A Kit version priced at "$346.95" USD.
SP-2717A Factory Assembled version priced at $524.95 USD.

The picture of the supply in the 1983 Spring/Summer catalog is Black and White so I can't tell whether the cover is Blue. All the search result
images of the Heathkit IP-2717A/SP-2717A -0-400VDC power supply show a Blue cover verses the IP17's Tan colored cover. All searches for
for the IP-2717A/SP-2717A schematics show zener and silicon diodes in place of the 2 OA2 regulator and 6X4 rectifier tubes. I can't say why
your supply has a Blue cover and the OA2 and 6X4 vacuum tubes. It might be due to an previous owner replaced the cover with a Blue
cover, maybe the owner liked the Blue better than the Tan color. I must admit the Blue cover does look much better than the Tan colored cover.
Anyway the IP-17 or IP-2717A/SP-2717A 0-400VDC supply is a good addition to the service bench. I use my IP-17 a lot to power circuits under test.

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73
Mike W5RKL
https://www.w5rkl.com


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 Post subject: Re: Heathkit Line
PostPosted: Jun Fri 16, 2017 6:45 pm 
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Joined: Nov Wed 15, 2006 7:56 am
Posts: 1335
Location: germany
w5rkl wrote:
I can't say why
your supply has a Blue cover and the OA2 and 6X4 vacuum tubes.


I think the answer will be this:
My psu have written on the front IP2717 without A :wink:
So the Zener replacement may be done in "A" models only and this is earlyer.
btw. the A model is a wrong construction, there must a diode parallel to the electrolytic to protect wrong polarity voltage. They have it forgotten.

greetings
Martin


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