{"id":13563,"date":"2015-06-12T07:28:06","date_gmt":"2015-06-12T11:28:06","guid":{"rendered":"http:\/\/swling.com\/blog\/?p=13563"},"modified":"2015-06-12T07:28:06","modified_gmt":"2015-06-12T11:28:06","slug":"tecsun-pl-680-ssb-display-inaccuracy","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2015\/06\/tecsun-pl-680-ssb-display-inaccuracy\/","title":{"rendered":"Tecsun PL-680: SSB display inaccuracy"},"content":{"rendered":"

\"PL-680-Sync-Detector\"<\/a><\/p>\n

SWLing Post reader,\u00a0Olli Turunen, writes:<\/p>\n

I thought you would like to know this. I bought PL-680 few days ago and I noticed that mine has the display about 1 khz off. I contact Anna on Anon-Co<\/a> and got a quick reply:<\/p>\n

“I have received a response from the supplier regarding the 1 kHz deviation issue of the PL-680 radio. Unfortunately they consider this to be within their tolerance standards for SW reception. Overall, their standard is set to be +\/- 0.5 kHz, which translates to 1 kHz on the LCD display. They understand the effect it may especially have for SSB listening, which is why fine tuning has been added as a feature.<\/p>\n

For MW\/AM the situation is a bit different. According to the supplier this is an issue that both the PL-680 and PL-660 radios have and cannot be avoided. As they indicate, unfortunately only the PL-880 has a special function for MW frequency calibration.”<\/p><\/blockquote>\n

I just checked my PL-680 and did a zero-beat in SSB against WWV on 10 MHz. If the BFO adjustment is correct when in the middle position, I can confirm that mine is almost 1 kHz too high as well.<\/p>\n

For AM listening, a 1 kHz deviation isn’t noticeable. \u00a0If you’re using ECSS<\/a>, though, you’ll certainly have to fine tune\u00a0the BFO accordingly. \u00a0If locating a CW or SSB signal\u00a0(in the ham bands, for example), you’ll also need to adjust the BFO fine tune control in advance.<\/p>\n

Most importantly–and fortunately–when you turn on the PL-680’s synchronous detection, the receiver is exactly on frequency (at least on my early model PL-680).<\/p>\n

Many thanks, Olli, for sharing this information! I’ll note this negative in the\u00a0PL-680 review<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

SWLing Post reader,\u00a0Olli Turunen, writes: I thought you would like to know this. I bought PL-680 few days ago and I noticed that mine has the display about 1 khz off. I contact Anna on Anon-Co and got a quick reply: “I have received a response from the supplier regarding the 1 kHz deviation issue […]<\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[1],"tags":[3457,479,3456,3896],"class_list":["post-13563","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-pl-680","tag-tecsun","tag-tecsun-pl-680","tag-tecsun-pl-680-frequency-calibration"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-3wL","jetpack-related-posts":[{"id":12258,"url":"https:\/\/swling.com\/blog\/2015\/02\/unboxing-the-tecsun-pl-680\/","url_meta":{"origin":13563,"position":0},"title":"Unboxing the Tecsun PL-680","author":"Thomas","date":"February 11, 2015","format":false,"excerpt":"When I got home, after a very long day, I found that FedEx delivered the Tecsun PL-680 I ordered from Anon-Co. \u00a0I haven't even had a moment\u00a0to listen to the PL-680 yet, but I hope to make time tomorrow. I'm happy to see that the PL-680 has hassle-free, well-designed packaging:\u2026","rel":"","context":"In "New Products"","block_context":{"text":"New Products","link":"https:\/\/swling.com\/blog\/category\/new-products\/"},"img":{"alt_text":"Tecsun-PL-680-6","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/02\/Tecsun-PL-680-6.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/02\/Tecsun-PL-680-6.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/02\/Tecsun-PL-680-6.jpg?resize=525%2C300 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/02\/Tecsun-PL-680-6.jpg?resize=700%2C400 2x"},"classes":[]},{"id":11674,"url":"https:\/\/swling.com\/blog\/2014\/12\/a-new-portable-the-tecsun-pl-680\/","url_meta":{"origin":13563,"position":1},"title":"The Tecsun PL-680: A new portable in the works?","author":"Thomas","date":"December 12, 2014","format":false,"excerpt":"SWLing Post reader, Antonio, writes: \"It seems that a new radio is on the horizon. Nevada Radio, in the U.K., has announced the new Tecsun PL-680.\" Thanks, Antonio--admittedly, I was completely unaware of this upcoming model. Based on the photo (above) via\u00a0Nevada Radio, the PL-680 looks very much like the\u2026","rel":"","context":"In "New Products"","block_context":{"text":"New Products","link":"https:\/\/swling.com\/blog\/category\/new-products\/"},"img":{"alt_text":"PL-680-Nevada","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/12\/PL-680-Nevada.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/12\/PL-680-Nevada.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/12\/PL-680-Nevada.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":28934,"url":"https:\/\/swling.com\/blog\/2017\/10\/tecsun-pl-680-rolf-touts-enhanced-performance-using-pl-660-mod\/","url_meta":{"origin":13563,"position":2},"title":"Tecsun PL-680: Rolf touts enhanced performance using PL-660 mod","author":"Thomas","date":"October 28, 2017","format":false,"excerpt":"Many thanks to SWLing Post contributor,\u00a0Rolf Snijder, who writes: I have made the same modification to the Tecsun PL-680, that was done [by many on the] PL-660 earlier. The PL-680 is now a great radio; I think now one of the best! I do not own a PL-660, so I\u2026","rel":"","context":"In "News"","block_context":{"text":"News","link":"https:\/\/swling.com\/blog\/category\/news\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/10\/Tecsun-PL-680-Mod-e1509192195607.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/10\/Tecsun-PL-680-Mod-e1509192195607.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/10\/Tecsun-PL-680-Mod-e1509192195607.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/10\/Tecsun-PL-680-Mod-e1509192195607.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":14504,"url":"https:\/\/swling.com\/blog\/2015\/08\/universal-radio-used-tecsun-pl-680-for-69-95\/","url_meta":{"origin":13563,"position":3},"title":"Universal Radio: Used Tecsun PL-680 for $69.95","author":"Thomas","date":"August 26, 2015","format":false,"excerpt":"I just noticed that Universal Radio is featuring the following used Tecsun PL-680 in their used receiver collection. Here's the description: The Tecsun PL-680 receives longwave, AM, FM and SW bands plus VHF Airband. It features a backlit digital display, stereo FM (to ear jack), SSB, clock timer, 2000 Memories,\u2026","rel":"","context":"In "Deals"","block_context":{"text":"Deals","link":"https:\/\/swling.com\/blog\/category\/deals\/"},"img":{"alt_text":"Universal-Radio-Used-Tecsun-PL-680","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/08\/Universal-Radio-Used-Tecsun-PL-680.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/08\/Universal-Radio-Used-Tecsun-PL-680.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/08\/Universal-Radio-Used-Tecsun-PL-680.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":13057,"url":"https:\/\/swling.com\/blog\/2015\/04\/tecsun-pl-680-now-available-on-ebay\/","url_meta":{"origin":13563,"position":4},"title":"Tecsun PL-680 now available on eBay","author":"Thomas","date":"April 27, 2015","format":false,"excerpt":"The Tecsun PL-680 is now available on eBay via my favorite Hong Kong-based seller, Anon-Co. Pricing is currently $105.99 + $18.00 shipping to UK\/US, $29.00 shipping to everyone else. Click here to read my review of the PL-680. Click here to search eBay for the PL-680.","rel":"","context":"In "New Products"","block_context":{"text":"New Products","link":"https:\/\/swling.com\/blog\/category\/new-products\/"},"img":{"alt_text":"Tecsun-PL-680-MW","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/02\/Tecsun-PL-680-MW.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/02\/Tecsun-PL-680-MW.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/02\/Tecsun-PL-680-MW.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":12313,"url":"https:\/\/swling.com\/blog\/2015\/02\/reader-survey-comparing-the-tecsun-pl-680-and-pl-660-synchronous-detection\/","url_meta":{"origin":13563,"position":5},"title":"Reader Survey: Comparing the Tecsun PL-680 and PL-660 synchronous detection","author":"Thomas","date":"February 16, 2015","format":false,"excerpt":"[Update: Please note that this survey has been closed, but the audio samples--labeled Radio A and Radio B--will remain to allow others the opportunity to make an evaluation prior to reading the PL-680 review.] [Update 2: The PL-680 review and readers' survey results have now been posted! Check it out\u2026","rel":"","context":"In "New Products"","block_context":{"text":"New Products","link":"https:\/\/swling.com\/blog\/category\/new-products\/"},"img":{"alt_text":"PL-680-Sync-Detector","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/02\/PL-680-Sync-Detector.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/02\/PL-680-Sync-Detector.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/02\/PL-680-Sync-Detector.jpg?resize=525%2C300 1.5x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/13563","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/comments?post=13563"}],"version-history":[{"count":0,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/13563\/revisions"}],"wp:attachment":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/media?parent=13563"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/categories?post=13563"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/tags?post=13563"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}