SG504: Difference between revisions

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* [http://www.bitsavers.org/pdf/tektronix/tm500/070-1632-01_SG504_Aug81.pdf Tektronix SG 504 Manual (PDF)]
{{TM500 | mfg=Tektronix | type=SG504 | function=leveled sinewave generator | class=signal generator | image=Tek sg504 front 5.jpg | introduced=1974 | discontinued=1993 |
designers= |manuals=
* [[Media:070-1632-01.pdf | Tektronix SG 504 Instruction Manual 070-1632-01]]
}}
{{BeginSpecs}}
{{Spec | Frequency range | 50 kHz or 6 MHz (Ref), 245 MHz to 550 MHz (Lo), 495 MHz to 1050 MHz (Hi) }}
{{Spec | Output amplitude | 0.5 V<sub>p-p</sub> to at least 4 V<sub>p-p</sub>, flat to within ±4% }}
{{Spec | Monitor output | 0.3 V<sub>p-p</sub> into 50 Ω }}
{{Spec | FM input | ±9 V into 50 kΩ (DC to 100 kHz)  produces ±0.05% to ±0.4% deviation depending on frequency }}
{{EndSpecs}}


==Output Head==
The SG504 is usually found on Ebay without the output head (015-0282-00).
David Partridge did an excellent teardown and reverse engineering of the output head and sells
[http://www.perdrix.co.uk/SG504Head/ kits to make new heads].
It's fairly easy to use that schematic to make a new level head that fits in a standard
BNC Pomona box since its function is really just a 250 MHz to 1050 MHz temperature
compensated power meter with 50 Ω feed-thru.  See the pictures for an example.
As of April 2016, [http://www.ebay.com/itm/131775163056 Ebay seller "ancelb" is selling SG504 leveling (output) heads]
that are specified to perform much better than the original Tektronix heads.  See photo below.
There is an open source project to replace the output head at [https://hackaday.io/project/18854-a-leveling-head-for-thetektronix-sg-504-sig-gen hackaday.io].
==Prices==
{| class="wikitable sortable"
|-
! Year
! 1979
! 1980
|-
! Catalog Price
| align="right" | $2,295
| align="right" | $2,350
|-
! In 2023 Dollars
| align="right" | $9,700
| align="right" | $8,800
|}
According to an [[Media:Tek Schottky Diodes Memo rot.pdf|internal memo]], annual sales were estimated at 350 units in 1979.
==Links==
{{Documents|Link=SG504}}
==Pictures==
<gallery>
Tek sg504 front 5.jpg
Tek sg504 1.jpg
Tek sg504 2.jpg
SG504.jpg |With output head (catalog picture)
SG504-B013377.jpg|Late Revision Front Panel with LED Frequency Readout
Tek sw503 dc502 sg504 dc508a mr501 tm515.png|SG504 in [[TM515]] with other TM500 gear
SG504_ServiceNote_Fig1.png|Service Note Fig.1
</gallery>
'''Output Head'''
<gallery>
<gallery>
File:Tek sg504 1.jpg
015-0282-00_1.jpg
File:Tek sg504 2.jpg
015-0282-00_2.jpg
015-0282-00_3.jpg
015-0282-00_4.jpg
015-0282-00_5.jpg
015-0282-00_6.jpg
015-0282-00_7.jpg
015-0282-00_8.jpg
sg504-diy-head.JPG|Home-made output head
Ancel sg504 head.jpg|SG504 head being produced and sold on Ebay by seller "ancelb"
</gallery>
</gallery>

Latest revision as of 01:25, 19 February 2024

Tektronix SG504
leveled sinewave generator
Tektronix SG504

Produced from 1974 to 1993

Manuals
(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

The Tektronix SG504 is a leveled sinewave generator plug-in for the TM500 system.

Key Specifications

Frequency range 50 kHz or 6 MHz (Ref), 245 MHz to 550 MHz (Lo), 495 MHz to 1050 MHz (Hi)
Output amplitude 0.5 Vp-p to at least 4 Vp-p, flat to within ±4%
Monitor output 0.3 Vp-p into 50 Ω
FM input ±9 V into 50 kΩ (DC to 100 kHz) produces ±0.05% to ±0.4% deviation depending on frequency

Output Head

The SG504 is usually found on Ebay without the output head (015-0282-00). David Partridge did an excellent teardown and reverse engineering of the output head and sells kits to make new heads.

It's fairly easy to use that schematic to make a new level head that fits in a standard BNC Pomona box since its function is really just a 250 MHz to 1050 MHz temperature compensated power meter with 50 Ω feed-thru. See the pictures for an example.

As of April 2016, Ebay seller "ancelb" is selling SG504 leveling (output) heads that are specified to perform much better than the original Tektronix heads. See photo below.

There is an open source project to replace the output head at hackaday.io.

Prices

Year 1979 1980
Catalog Price $2,295 $2,350
In 2023 Dollars $9,700 $8,800

According to an internal memo, annual sales were estimated at 350 units in 1979.

Links

Documents Referencing SG504

Document Class Title Authors Year Links
070-2088-01.pdf Book TM500 Series Rear Interface Data Book 1976
Tekscope 1976 V8 N1.pdf Article New Products 1976
070-2088-04.pdf Book TM500 Series Rear Interface Data Book 1985

Pictures

Output Head